cc: Partial tile update for one-copy raster.

cc/resources/one_copy_tile_task_worker_pool.h

Index: cc/resources/one_copy_tile_task_worker_pool.h
diff --git a/cc/resources/one_copy_tile_task_worker_pool.h b/cc/resources/one_copy_tile_task_worker_pool.h
index 51996677623909aa88ee1aeb1b93f2d0559f5ba8..bb6c7b5b793a3f9a7cb97a7585243a45e458afb2 100644
--- a/cc/resources/one_copy_tile_task_worker_pool.h
+++ b/cc/resources/one_copy_tile_task_worker_pool.h
@@ -52,7 +52,7 @@ class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
 
   // Overridden from TileTaskClient:
   scoped_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource) override;
+      const TileTaskData& data) override;
   void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override;
 
   // Playback raster source and schedule copy of |src| resource to |dst|
@@ -60,7 +60,10 @@ class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
   CopySequenceNumber PlaybackAndScheduleCopyOnWorkerThread(
       scoped_ptr<ResourceProvider::ScopedWriteLockGpuMemoryBuffer> write_lock,
       scoped_ptr<ScopedResource> src,
-      const Resource* dst,
+      scoped_ptr<ResourceProvider::ScopedReadLockGpuMemoryBuffer>
+          previous_frame_read_lock,
+      scoped_ptr<ScopedResource> previous_frame_src,
+      const TileTaskData& data,
       const RasterSource* raster_source,
       const gfx::Rect& rect,
       float scale);
@@ -83,12 +86,18 @@ class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
     CopyOperation(
         scoped_ptr<ResourceProvider::ScopedWriteLockGpuMemoryBuffer> write_lock,
         scoped_ptr<ScopedResource> src,
-        const Resource* dst);
+        scoped_ptr<ResourceProvider::ScopedReadLockGpuMemoryBuffer>
+            previous_frame_read_lock,
+        scoped_ptr<ScopedResource> previous_frame_src,
+        const TileTaskData& data);
     ~CopyOperation();
 
     scoped_ptr<ResourceProvider::ScopedWriteLockGpuMemoryBuffer> write_lock;
     scoped_ptr<ScopedResource> src;
-    const Resource* dst;
+    scoped_ptr<ResourceProvider::ScopedReadLockGpuMemoryBuffer>
+        previous_frame_read_lock;
+    scoped_ptr<ScopedResource> previous_frame_src;
+    TileTaskData tile_task_data;
   };
 
   void OnTaskSetFinished(TaskSet task_set);