Ensure non-renderable formats don't support multisampling

This patch removes the support of multisampling on the below 4
formats as they are not renderable according to the discussions at
https://github.com/gpuweb/gpuweb/issues/2465.
- R8Snorm
- RG8Snorm
- RGBA8Snorm
- RG11B10Ufloat

BUG=chromium:1299154, dawn:1244
TEST=dawn_unittests

Change-Id: I3837f2aee322a71c90772322dc01fae410f03e57
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/81801
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>

src/dawn/native/Format.cpp

@@ -167,6 +167,10 @@ namespace dawn::native {
                 internalFormat.isCompressed = false;
                 internalFormat.isSupported = true;
                 internalFormat.supportsStorageUsage = supportsStorageUsage;
+
+                if (supportsMultisample) {
+                    ASSERT(renderable);
+                }
                 internalFormat.supportsMultisample = supportsMultisample;
                 internalFormat.supportsResolveTarget = supportsResolveTarget;
                 internalFormat.aspects = Aspect::Color;
@@ -338,7 +342,7 @@ namespace dawn::native {
         // clang-format off
         // 1 byte color formats
         AddColorFormat(wgpu::TextureFormat::R8Unorm, true, false, true, true, 1, kAnyFloat, 1);
-        AddColorFormat(wgpu::TextureFormat::R8Snorm, false, false, true, false, 1, kAnyFloat, 1);
+        AddColorFormat(wgpu::TextureFormat::R8Snorm, false, false, false, false, 1, kAnyFloat, 1);
         AddColorFormat(wgpu::TextureFormat::R8Uint, true, false, true, false, 1, SampleTypeBit::Uint, 1);
         AddColorFormat(wgpu::TextureFormat::R8Sint, true, false, true, false, 1, SampleTypeBit::Sint, 1);
 
@@ -347,7 +351,7 @@ namespace dawn::native {
         AddColorFormat(wgpu::TextureFormat::R16Sint, true, false, true, false, 2, SampleTypeBit::Sint, 1);
         AddColorFormat(wgpu::TextureFormat::R16Float, true, false, true, true, 2, kAnyFloat, 1);
         AddColorFormat(wgpu::TextureFormat::RG8Unorm, true, false, true, true, 2, kAnyFloat, 2);
-        AddColorFormat(wgpu::TextureFormat::RG8Snorm, false, false, true, false, 2, kAnyFloat, 2);
+        AddColorFormat(wgpu::TextureFormat::RG8Snorm, false, false, false, false, 2, kAnyFloat, 2);
         AddColorFormat(wgpu::TextureFormat::RG8Uint, true, false, true, false, 2, SampleTypeBit::Uint, 2);
         AddColorFormat(wgpu::TextureFormat::RG8Sint, true, false, true, false, 2, SampleTypeBit::Sint, 2);
 
@@ -360,14 +364,14 @@ namespace dawn::native {
         AddColorFormat(wgpu::TextureFormat::RG16Float, true, false, true, true, 4, kAnyFloat, 2);
         AddColorFormat(wgpu::TextureFormat::RGBA8Unorm, true, true, true, true, 4, kAnyFloat, 4);
         AddColorFormat(wgpu::TextureFormat::RGBA8UnormSrgb, true, false, true, true, 4, kAnyFloat, 4, wgpu::TextureFormat::RGBA8Unorm);
-        AddColorFormat(wgpu::TextureFormat::RGBA8Snorm, false, true, true, false, 4, kAnyFloat, 4);
+        AddColorFormat(wgpu::TextureFormat::RGBA8Snorm, false, true, false, false, 4, kAnyFloat, 4);
         AddColorFormat(wgpu::TextureFormat::RGBA8Uint, true, true, true, false, 4, SampleTypeBit::Uint, 4);
         AddColorFormat(wgpu::TextureFormat::RGBA8Sint, true, true, true, false, 4, SampleTypeBit::Sint, 4);
         AddColorFormat(wgpu::TextureFormat::BGRA8Unorm, true, false, true, true, 4, kAnyFloat, 4);
         AddColorFormat(wgpu::TextureFormat::BGRA8UnormSrgb, true, false, true, true, 4, kAnyFloat, 4, wgpu::TextureFormat::BGRA8Unorm);
         AddColorFormat(wgpu::TextureFormat::RGB10A2Unorm, true, false, true, true, 4, kAnyFloat, 4);
 
-        AddColorFormat(wgpu::TextureFormat::RG11B10Ufloat, false, false, true, false, 4, kAnyFloat, 3);
+        AddColorFormat(wgpu::TextureFormat::RG11B10Ufloat, false, false, false, false, 4, kAnyFloat, 3);
         AddColorFormat(wgpu::TextureFormat::RGB9E5Ufloat, false, false, false, false, 4, kAnyFloat, 3);
 
         // 8 bytes color formats

src/dawn/utils/TextureUtils.cpp

@@ -146,6 +146,10 @@ namespace utils {
             case wgpu::TextureFormat::RGBA32Sint:
             case wgpu::TextureFormat::RGBA32Float:
             case wgpu::TextureFormat::RGB9E5Ufloat:
+            case wgpu::TextureFormat::R8Snorm:
+            case wgpu::TextureFormat::RG8Snorm:
+            case wgpu::TextureFormat::RGBA8Snorm:
+            case wgpu::TextureFormat::RG11B10Ufloat:
                 return false;
 
             default: