cc: Partial tile update for one-copy raster.

cc/resources/tile_task_runner.h

 // Copyright 2014 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_TILE_TASK_RUNNER_H_
 #define CC_RESOURCES_TILE_TASK_RUNNER_H_
 
 #include <bitset>
 #include <vector>
 
 #include "base/callback.h"
 #include "cc/resources/resource_format.h"
 #include "cc/resources/task_graph_runner.h"
+#include "ui/gfx/geometry/rect.h"
 
 namespace cc {
 class ImageDecodeTask;
 class RasterTask;
 class Resource;
 class RasterBuffer;
 
+struct TileTaskData {
+  TileTaskData(const Resource* resource,
+               uint64_t new_tile_id,
+               uint64_t previous_tile_id,
+               const gfx::Rect& raster_dirty_rect)
+      : resource(resource),
+        new_tile_id(new_tile_id),
+        previous_tile_id(previous_tile_id),
+        raster_dirty_rect(raster_dirty_rect) {}
+
+  const Resource* resource;
+  uint64_t new_tile_id;
+  uint64_t previous_tile_id;
+  gfx::Rect raster_dirty_rect;
+};
+
 class CC_EXPORT TileTaskClient {
  public:
   virtual scoped_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource) = 0;
+      const TileTaskData& data) = 0;
   virtual void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) = 0;
 
  protected:
   virtual ~TileTaskClient() {}
 };
 
 class CC_EXPORT TileTask : public Task {
  public:
   typedef std::vector<scoped_refptr<TileTask>> Vector;
 
@@ skipping 128 matching lines @@
   // Returns the format to use for the tiles.
   virtual ResourceFormat GetResourceFormat() = 0;
 
  protected:
   virtual ~TileTaskRunner() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_TASK_RUNNER_H_