cc: Partial tile update for one-copy raster.

cc/raster/pixel_buffer_tile_task_worker_pool.cc

Index: cc/raster/pixel_buffer_tile_task_worker_pool.cc
diff --git a/cc/raster/pixel_buffer_tile_task_worker_pool.cc b/cc/raster/pixel_buffer_tile_task_worker_pool.cc
index 674e145c534572a2a1909a074cdaa9a300730229..abf6ba635aecf8851568aee542262d06237c490e 100644
--- a/cc/raster/pixel_buffer_tile_task_worker_pool.cc
+++ b/cc/raster/pixel_buffer_tile_task_worker_pool.cc
@@ -43,7 +43,7 @@ class RasterBufferImpl : public RasterBuffer {
 
     TileTaskWorkerPool::PlaybackToMemory(memory_, resource_->format(),
                                          resource_->size(), stride_,
-                                         raster_source, rect, scale);
+                                         raster_source, rect, rect, scale);
   }
 
  private:
@@ -312,9 +312,9 @@ ResourceFormat PixelBufferTileTaskWorkerPool::GetResourceFormat() {
 }
 
 scoped_ptr<RasterBuffer> PixelBufferTileTaskWorkerPool::AcquireBufferForRaster(
-    const Resource* resource) {
+    const TileTaskData& data) {
   return make_scoped_ptr<RasterBuffer>(
-      new RasterBufferImpl(resource_provider_, resource));
+      new RasterBufferImpl(resource_provider_, data.resource));
 }
 
 void PixelBufferTileTaskWorkerPool::ReleaseBufferForRaster(