cc: Remove all traces of synchronous GPU rasterization

cc/resources/rasterizer.h

-// 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_RESOURCES_RASTERIZER_H_
-#define CC_RESOURCES_RASTERIZER_H_
-
-#include <vector>
-
-#include "cc/base/cc_export.h"
-#include "cc/resources/resource_pool.h"
-#include "cc/resources/tile.h"
-
-namespace cc {
-class TileManager;
-
-enum class PrepareTilesMode {
-  RASTERIZE_PRIORITIZED_TILES,
-  PREPARE_NONE
-};
-
-class CC_EXPORT Rasterizer {
- public:
-  using TileVector = std::vector<Tile*>;
-  using UpdateTileDrawInfoCallback =
-      base::Callback<void(Tile*,
-                          scoped_ptr<ScopedResource>,
-                          const RasterSource::SolidColorAnalysis&)>;
-
-  virtual ~Rasterizer() {}
-  virtual PrepareTilesMode GetPrepareTilesMode() = 0;
-  virtual void RasterizeTiles(
-      const TileVector& tiles,
-      ResourcePool* resource_pool,
-      ResourceFormat resource_format,
-      const UpdateTileDrawInfoCallback& update_tile_draw_info) = 0;
-
- protected:
-  Rasterizer() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Rasterizer);
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_RASTERIZER_H_