Reland of cc: Add mailbox support to ResourceProvider write locks.

cc/raster/gpu_rasterizer.h

Index: cc/raster/gpu_rasterizer.h
diff --git a/cc/raster/gpu_rasterizer.h b/cc/raster/gpu_rasterizer.h
deleted file mode 100644
index 592dea773ab3c31d83524f5f0eedc2b503fe8153..0000000000000000000000000000000000000000
--- a/cc/raster/gpu_rasterizer.h
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2015 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 CC_RASTER_GPU_RASTERIZER_H_
-#define CC_RASTER_GPU_RASTERIZER_H_
-
-#include <vector>
-
-#include "base/macros.h"
-#include "cc/base/cc_export.h"
-#include "cc/playback/raster_source.h"
-#include "cc/resources/resource_pool.h"
-#include "cc/tiles/tile.h"
-#include "third_party/skia/include/core/SkMultiPictureDraw.h"
-
-namespace cc {
-
-class ContextProvider;
-class RasterSource;
-class ResourceProvider;
-
-class CC_EXPORT GpuRasterizer {
- public:
-  ~GpuRasterizer();
-
-  void RasterizeSource(ResourceProvider::ScopedWriteLockGr* write_lock,
-                       const RasterSource* raster_source,
-                       const gfx::Rect& raster_full_rect,
-                       const gfx::Rect& playback_rect,
-                       float scale,
-                       const RasterSource::PlaybackSettings& playback_settings);
-
-  ResourceProvider* resource_provider() const { return resource_provider_; }
-  ContextProvider* worker_context_provider() const {
-    return worker_context_provider_;
-  }
-
- private:
-  GpuRasterizer(ContextProvider* worker_context_provider,
-                ResourceProvider* resource_provider,
-                bool use_distance_filed_text,
-                int msaa_sample_count);
-
-  ContextProvider* worker_context_provider_;
-  ResourceProvider* resource_provider_;
-
-  bool use_distance_field_text_;
-  int msaa_sample_count_;
-
-  friend class GpuRasterBufferProvider;
-  DISALLOW_COPY_AND_ASSIGN(GpuRasterizer);
-};
-
-}  // namespace cc
-
-#endif  // CC_RASTER_GPU_RASTERIZER_H_