Implement RenderBundle in the frontend

This CL implements RenderBundle and RenderBundleEncoder in the frontend
and adds unittests for validation.

Bug: dawn:154
Change-Id: Ice5ecd384cd627ad270b73052408f8139d1ea5f4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/9221
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>

src/dawn_native/RenderBundle.cpp

@@ -0,0 +1,61 @@
+// Copyright 2019 The Dawn Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "dawn_native/RenderBundle.h"
+
+#include "common/BitSetIterator.h"
+#include "dawn_native/Commands.h"
+#include "dawn_native/Device.h"
+#include "dawn_native/RenderBundleEncoder.h"
+
+namespace dawn_native {
+
+    RenderBundleBase::RenderBundleBase(RenderBundleEncoderBase* encoder,
+                                       const RenderBundleDescriptor* descriptor,
+                                       AttachmentState* attachmentState,
+                                       PassResourceUsage resourceUsage)
+        : ObjectBase(encoder->GetDevice()),
+          mCommands(encoder->AcquireCommands()),
+          mAttachmentState(attachmentState),
+          mResourceUsage(std::move(resourceUsage)) {
+    }
+
+    RenderBundleBase::~RenderBundleBase() {
+        FreeCommands(&mCommands);
+    }
+
+    // static
+    RenderBundleBase* RenderBundleBase::MakeError(DeviceBase* device) {
+        return new RenderBundleBase(device, ObjectBase::kError);
+    }
+
+    RenderBundleBase::RenderBundleBase(DeviceBase* device, ErrorTag errorTag)
+        : ObjectBase(device, errorTag) {
+    }
+
+    CommandIterator* RenderBundleBase::GetCommands() {
+        return &mCommands;
+    }
+
+    const AttachmentState* RenderBundleBase::GetAttachmentState() const {
+        ASSERT(!IsError());
+        return mAttachmentState.Get();
+    }
+
+    const PassResourceUsage& RenderBundleBase::GetResourceUsage() const {
+        ASSERT(!IsError());
+        return mResourceUsage;
+    }
+
+}  // namespace dawn_native