38 Commits

Author SHA1 Message Date
Stephen White
f31b78e90e Enable all remaining end2end tests on OpenGL ES backend.
This enables all the tests which pass on ES 3.2.

BUG=dawn:580

Change-Id: I56fde768a917d74f24e53cd2f7367aa165c4ac4f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/34720
Commit-Queue: Stephen White <senorblanco@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2020-12-04 15:59:29 +00:00
Austin Eng
303c5c2d29 Update RenderPassTests to use WGSL
Bug: dawn:572
Change-Id: I4a892249dfcb1b1badffd8fb7bd6e509eb654234
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/33767
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
2020-11-26 15:36:56 +00:00
Corentin Wallez
6b087819dd s/OutputAttachment/RenderAttachment/g
But also keep OutputAttachment so it can be gradually changed in all
dependants.

See https://github.com/gpuweb/gpuweb/pull/1168 and
https://github.com/gpuweb/gpuweb/pull/1168

Bug: dawn:22
Change-Id: I6a1ec1de6c22ca4deac88b7fffde4b98d9d54a84
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/31040
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2020-10-27 15:35:56 +00:00
Corentin Wallez
a3651d2fe0 Fix deprecation errors for indexFormat being set.
Bug: dawn:502
Change-Id: Ib49a1e6cceb0632792a499314f5e0e4b3434deb7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/28780
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
2020-09-23 07:23:56 +00:00
Kai Ninomiya
2afea0c671 Autoformat all tests and examples
Bug: none
Change-Id: I69904944db1d4c2fbcca74bb8b66b5a7524e76bb
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/24642
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
2020-07-10 20:33:08 +00:00
Corentin Wallez
4234d78201 Deprecate TextureDescriptor::arrayLayerCount -> size.depth
This updates CL:

 - Adds a deprecation warning to use size.depth instead of
arrayLayerCount.
 - Changes all tests and samples to use size.depth.
 - Adds deprecation tests for the change.

In particular the state tracking in TextureBase isn't changed yet
because it requires non-trivial changes in the backends. It will be done
in a follow-up CL.

Bug:dawn:22

Change-Id: Ic02dfb5baaba8d5b06cd339ce988e9b1d16cb5e9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/23101
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2020-06-15 09:46:01 +00:00
Austin Eng
40dc5d3f21 Cleanup: Remove unnecessary TestSetUp overload
Bug: dawn:396
Change-Id: I9d12fb983ea3ef3a01b569caff453a441ab86c70
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/21700
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
2020-05-15 22:06:35 +00:00
Corentin Wallez
67b1ad7a97 Add the defaults for Draw and DrawIndexed
And updates all places in tests and examples where they could have been
used.

Bug: dawn:22
Change-Id: Ic36e3f1810037b5addeb9e971b1da28fdd1da183
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/18380
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2020-03-31 16:21:35 +00:00
Austin Eng
6c1d646ee9 Change extern const DawnTestParam helpers to functions
If these extern variables are initialized after DAWN_INSTANTIATE_TEST,
they will be zero. Change them to be function calls instead.
Since they're function calls, fold in arguments from ForceToggles to
enable/disable toggles.

Bug: dawn:341
Change-Id: I1aeaa1e535a0a003977e8ce7ab3d5278c5d81281
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/16162
Reviewed-by: Mark Henderson <mehe@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
2020-02-25 16:23:17 +00:00
Corentin Wallez
84a57756db Vulkan: Choose D32S8 or D24S8 depending on availability
The Vulkan spec mandates support for only one or the other, which is
why we have the concept of a depth24plus format. This also adds a Toggle
to test both formats in DepthStencilStateTests.

Finally this renames ForceWorkarounds to ForceToggles because toggles
can be more than just workarounds.

BUG=dawn:286

Change-Id: I5b5dc582ffd4ee61c51e3e75563aec815c580511
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14103
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: David Turner <digit@google.com>
2019-12-05 14:02:11 +00:00
Yunchao He
0c02f54edf code refactoring: prefix const color values with RGBA8
BUG=
Change-Id: I820180adc19b1d1c226ca92084c64e441173c27b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13760
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
2019-11-19 17:57:30 +00:00
Yunchao He
e0eeef4b34 code refactoring: const color values
BUG=
Change-Id: I6f394fd8ae45d30e1e3846b9a7a03f51efb8a475
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13660
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
2019-11-18 03:27:44 +00:00
Brandon Jones
700cfe7664 Implement D3D12 Native Render Passes
Uses D3D12 native render pass API when possible. On pre-RS5 builds of
Windows, Dawn will fall back to a software emulated render pass. A
toggle was added to provide test coverage to the emulated render pass
implementation and used in tests that test render pass functionality in
particular.

Bug: dawn:36
Change-Id: I297a3ec7655b68d28204db2d3ab78cb82bb4e7a5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/13082
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Brandon Jones <brandon1.jones@intel.com>
2019-11-12 18:14:21 +00:00
Corentin Wallez
cab352c2f6 Make end2end and perf tests use webgpu.h
BUG=dawn:22

Change-Id: Ief855d294779b97283a79532e9d503aab6fda751
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12740
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2019-10-28 13:27:36 +00:00
Corentin Wallez
04863c42be Make examples and utils use webgpu.h
BUG=dawn:22

Change-Id: I602d6a3422b493d199f3fded61ff1666bc2d9d7d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12702
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-10-25 11:36:47 +00:00
Austin Eng
e79b06100f Skip tests if no adapter is available
Bug: dawn:208
Change-Id: I076fd497101dd017e8d83ae034edb7b1fa1f8581
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/11941
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
2019-10-09 16:23:22 +00:00
Jiawei Shao
55a00c7a1f Set writemask to 0 when no fs output matches color state on Metal and Vulkan
This patch fixes an undefined behaviour on Metal and Vulkan when there
is a color state whose corresponding fragment output is not declared in
the fragment shader.

According to Vulkan SPEC (Chapter 14.3), the input values to blending or
color attachment writes are undefined for components which do not
correspond to a fragment shader output. Vulkan validation layer follows
the SPEC that it only allows the shader to not produce a matching output
if the writemask is 0, or it will report a warning when the application
is against this rule.

When no fragment output matches the color state in a render pipeline,
the output differs on different Metal devices. On some Metal devices the
fragment output will be (0, 0, 0, 0) even if it is not declared in the
shader, while on others there will be no fragment outputs and the content
in the color attachments is not changed.

This patch fixes this issue by setting the color write mask to 0 to
prevent the undefined values being written into the color attachments.

With this patch, the following end2end tests will not report warnings
any more when we enable the Vulkan validation layer:
ObjectCachingTest.RenderPipelineDeduplicationOnLayout/Vulkan
ObjectCachingTest.RenderPipelineDeduplicationOnVertexModule/Vulkan
ObjectCachingTest.RenderPipelineDeduplicationOnFragmentModule/Vulkan

BUG=dawn:209
TEST=dawn_end2end_tests

Change-Id: I5613daa1b9a45349ea1459fbdfe4a12d6149f0f7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/11581
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
2019-09-30 07:27:57 +00:00
Corentin Wallez
c81a717379 Remove indirection for colorStates
This is to match the work in progress webgpu.h header.

BUG=dawn:22

Change-Id: Ia1077fef95e6bda541cddbd2f6ce40b79138e960
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/9383
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-09-20 23:22:27 +00:00
Yunchao He
394553b02e Set y-axis up in normalized coordinate system.
BUG=dawn:224

Change-Id: I6bb4946e87b593f1d62a13b3b8ab38f21d3e9ffb
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10201
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
2019-09-20 23:04:47 +00:00
Corentin Wallez
a838c7d497 Remove indirection for colorAttachments
This is to match the work in progress webgpu.h header.

BUG=dawn:22

Change-Id: I1371cda1b7666de8eb8283fa7e5da935d17e1d52
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/9381
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
2019-09-20 22:59:47 +00:00
Corentin Wallez
c6c7a42e6e Remove indirection for vertexStage
This is to match the work in progress webgpu.h header.

Also contains a fix for the wire where it wouldn't GetExtraRequiredSize
for structures that are by-value members of other structures.

BUG=dawn:22

Change-Id: I3c706bf9cd7a550d40fd667877f032c860d0a032
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/9382
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2019-09-05 09:35:07 +00:00
Kai Ninomiya
4078ed8b62 Remove Texture::createDefaultView
https://github.com/gpuweb/gpuweb/pull/389

Bug: dawn:214
Change-Id: I86b8c46c71c3e5b9622ab3656124b312d3e85a7a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10420
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2019-08-27 17:56:23 +00:00
Corentin Wallez
b9b088f57e Rename ShaderStageBit to ShaderStage.
This is to follow changes to WebGPU's IDL and header file where the Bit
suffix disappeared. This caused a conflict with
utils/dawn_native::ShaderStage that were both renamed to
SingleShaderStage.

BUG-dawn: 22
Change-Id: I7b085686775fa19e4b4a3b54979903d72f3ef660
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10462
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
2019-08-27 08:42:29 +00:00
Corentin Wallez
9e9e29f7a6 Remove Bit from TextureUsageBit and BufferUsageBit
This is to match the naming convention of WebGPU's WebIDL and webgpu.h

BUG=dawn:22

Change-Id: Ia91c5a018403e6a72eb0311b5f1a072d102282a2
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10461
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
2019-08-27 08:21:39 +00:00
Corentin Wallez
2a1d8c2b1d Remove ShaderStage that doesn't exist in WebGPU.
Instead it is replaced by one enum in dawn_native and another in utils.

BUG=dawn:22

Change-Id: I094a40c8d4e22b704e59aea60cbefd1f05c5352a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/8800
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-07-12 17:52:22 +00:00
Corentin Wallez
ec05355c72 Rename Transfer[Src|Dst] to Copy[Src|Dst]
This is to match the equivalent rename in WebGPU's IDL.

BUG=dawn:22

Change-Id: Ibdf75869e58835d984df559878b884c55310a403
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/8623
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Yunchao He <yunchao.he@intel.com>
2019-07-08 10:05:46 +00:00
Corentin Wallez
77fa31c5c6 Make Texture format names match WebGPU
BUG=dawn:128

Change-Id: I73cc77082d02941d91fab8ee578e529db979fed1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/8164
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2019-06-19 09:26:07 +00:00
Austin Eng
f4c3f4562e Disable RenderPassTest.TwoRenderPassesInOneCommandBuffer on OpenGL and Metal
This test is flaky on Metal and consistently failing on OpenGL.

TBR=cwallez@chromium.org,kainino@chromium.org
Bug: chromium:950768
Change-Id: I0e62b87053009182afef39e5ef2459b30a866418
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6500
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
2019-04-10 20:25:57 +00:00
Austin Eng
b4b3ea05eb Reland "Rename texture.createTextureView to createView to match WebGPU"
This is a reland of 6f0b021dbf1ac6f66690eff7ae2cad2ac2c2df89.
It also renames CreateDefaultTextureView to CreateDefaultView in a test
that landed after the tryjobs for the reverted patch passed.

Original change's description:
> Rename texture.createTextureView to createView to match WebGPU
>
> Bug: chromium:877147
> Change-Id: I186fc26054cc6729c859a4161c755a1133dc0bca
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6360
> Commit-Queue: Austin Eng <enga@chromium.org>
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Bug: chromium:877147
Change-Id: I8e1a1adc07ad2c78081ae3cb0fa2bdb648b39c50
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6361
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
2019-04-09 16:57:00 +00:00
Yuly Novikov
2d4c66d2b8 Revert "Rename texture.createTextureView to createView to match WebGPU"
This reverts commit 6f0b021dbf1ac6f66690eff7ae2cad2ac2c2df89.

Reason for revert: breaks compilation on https://ci.chromium.org/p/chromium/builders/ci/GPU%20FYI%20Linux%20Builder%20%28dbg%29/62003

Original change's description:
> Rename texture.createTextureView to createView to match WebGPU
> 
> Bug: chromium:877147
> Change-Id: I186fc26054cc6729c859a4161c755a1133dc0bca
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6360
> Commit-Queue: Austin Eng <enga@chromium.org>
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>

TBR=cwallez@chromium.org,kainino@chromium.org,enga@chromium.org

Change-Id: I2d337881fc05cf8128ae7ab268514ea7ef462123
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:877147
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6420
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@google.com>
2019-04-09 15:28:01 +00:00
Austin Eng
6f0b021dbf Rename texture.createTextureView to createView to match WebGPU
Bug: chromium:877147
Change-Id: I186fc26054cc6729c859a4161c755a1133dc0bca
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6360
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2019-04-09 15:13:10 +00:00
Yunchao He
f856903154 Move vertex index format from RenderPipelineDesc to InputStateDesc
Bug=dawn:107

Change-Id: Ia88232848995d5c4c3ac0f3137ffa518e85aa0a0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6140
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-03-28 17:09:23 +00:00
Jiawei Shao
b2c5023c9c Remove RenderPassDescriptorBuilder
This patch removes RenderPassDescriptorBuilder completely from Dawn.
With this patch, RenderPassDescriptor is a structure instead of a Dawn
object, and all the checks in RenderPassDescriptorBuilder are moved into
CommandEncoder.cpp.

This patch also updates the helper functions and structures related to
RenderPassDescriptor because RenderPassDescriptor is no longer an
object but a structure with members in pointers.

BUG=dawn:6

Change-Id: Ic6d015582031891f35ffef912f0e460a9c010f81
Reviewed-on: https://dawn-review.googlesource.com/c/4902
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-02-27 09:21:56 +00:00
Corentin Wallez
e30d5e17e4 Require a semicolon at the end of DAWN_INSTANTIATE_TEST
TBR=kainino@chromium.org
BUG=chromium:926235

Change-Id: I67d8c594cd8dc060482e16de39b1996e01e9b44f
Reviewed-on: https://dawn-review.googlesource.com/c/4960
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
2019-02-21 14:57:01 +00:00
Jiawei Shao
2030166137 Rename several parameters to match WebGPU IDL
This patch renames the following parameters to match the latest WebGPU
IDL:
- BindGroupDescriptor.numBindings -> bindingCount
- BindGroupLayoutDescriptor.numBindings -> bindingCount
- BindGroupDescriptor.numBindings -> bindingCount
- queue.submit(numCommands, ..) -> commandCount
- RenderPipelineDescriptor.numColorStates -> colorStateCount
- TextureDescriptor:
  arraySize -> arrayLayerCount
  levelCount -> mipLevelCount
- TextureViewDescriptor:
  levelCount -> mipLevelCount
  layerCount -> arrayLayerCount

BUG=dawn:80

Change-Id: I615842dd5754d1ae1ddff31e25403bb3161f0201
Reviewed-on: https://dawn-review.googlesource.com/c/4881
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2019-02-21 00:45:19 +00:00
Yunchao He
938811eef9 Use const*const* to annotate color state descriptors
Color state descriptors are a sequence of descriptors embedded
in RenderPipeline descriptor. We should use const*const* to
annotate them for supporting potential extended features added
in color state descriptors in future.

BUG=dawn:77

Change-Id: Id755569fa5076668c3db7b219b699845bc2a1d69
Reviewed-on: https://dawn-review.googlesource.com/c/4880
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
2019-02-20 13:00:36 +00:00
Corentin Wallez
e1f0d4e639 WebGPU error handling 2: CommandEncoder for samples and end2end tests
CommandEncoder is the replacement for CommandBufferBuilder. This commit
adds the dawn.json definition for it and an initial implementation that
wraps CommandBufferBuilder. This is done so that the code can be ported
to CommandEncoder gradually, otherwise the commit would be too big and
would risk many merge conflicts.

This converts all samples and end2end tests to use CommandEncoder.

BUG=dawn:8

Change-Id: If4ce86e6fb39ba4e0c2af6328d40e63be17d18c1
Reviewed-on: https://dawn-review.googlesource.com/c/4741
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-02-15 12:54:08 +00:00
Jiawei Shao
c8b067d2df D3D12: Remove RenderPassDescriptorD3D12
This patch removes RenderPassDescriptorD3D12 completely and moves the
creation of RTVs and DSVs to CommandBufferD3D12::RecordCommands(), where
we allocate all RTVs and DSVs used in the current command buffer in one
RTV heap and one DSV heap. Note that the method to allocate RTVs and
DSVs are too simple in this patch, and we will optimize it later.

This patch also adds a test to make sure Dawn works correctly when we
use two different render passes in one command buffer.

This patch is one of the preparations on completely removing
RenderPassDescriptorBuilder from Dawn.

BUG=dawn:6

Change-Id: I02e30c007fb8668a7474a3caf7a858782d0c92df
Reviewed-on: https://dawn-review.googlesource.com/c/4520
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
2019-02-15 10:55:08 +00:00