OOPIF support for layout test pixel dumps.

content/renderer/layout_test_dependencies.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDER_LAYOUT_TEST_DEPENDENCIES_H_
 #define CONTENT_RENDER_LAYOUT_TEST_DEPENDENCIES_H_
 
 #include <stdint.h>
 #include <memory>
 
 #include "base/memory/ref_counted.h"
 
 namespace cc {
-class ContextProvider;
 class CopyOutputRequest;
-class LayerTreeFrameSink;
 class SwapPromise;
 }
 
-namespace gpu {
-class GpuChannelHost;
-class GpuMemoryBufferManager;
-}
-
 namespace content {
-class CompositorDependencies;
 
 // This class allows injection of LayoutTest-specific behaviour to the
 // RenderThreadImpl.
 class LayoutTestDependencies {
  public:
-  virtual std::unique_ptr<cc::LayerTreeFrameSink> CreateLayerTreeFrameSink(
-      int32_t routing_id,
-      scoped_refptr<gpu::GpuChannelHost> gpu_channel,
-      scoped_refptr<cc::ContextProvider> compositor_context_provider,
-      scoped_refptr<cc::ContextProvider> worker_context_provider,
-      gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
-      CompositorDependencies* deps) = 0;
-
   // Returns a SwapPromise which should be queued for the next compositor frame.
+  // DO NOT SUBMIT: This method (and the whole class) should be removed.  We
+  // should wait for SubmitCompositorFrame in the browser process (e.g.  see the
+  // comment from kenrb@ in SurfaceHitTestReadyNotifier::WaitForSurfaceReady)
+  // rather than waiting in the renderer.
   virtual std::unique_ptr<cc::SwapPromise> RequestCopyOfOutput(
       int32_t routing_id,
       std::unique_ptr<cc::CopyOutputRequest> request) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDER_LAYOUT_TEST_DEPENDENCIES_H_