cc: Partial tile update for one-copy raster.

cc/resources/zero_copy_tile_task_worker_pool.cc

Index: cc/resources/zero_copy_tile_task_worker_pool.cc
diff --git a/cc/resources/zero_copy_tile_task_worker_pool.cc b/cc/resources/zero_copy_tile_task_worker_pool.cc
index 17acf6f9e51c72cbcaeabcd472f1d2df91e2a9be..287541e1958c2355de0d375026b3a73c397e5b55 100644
--- a/cc/resources/zero_copy_tile_task_worker_pool.cc
+++ b/cc/resources/zero_copy_tile_task_worker_pool.cc
@@ -38,7 +38,7 @@ class RasterBufferImpl : public RasterBuffer {
     gpu_memory_buffer->GetStride(&stride);
     TileTaskWorkerPool::PlaybackToMemory(data, resource_->format(),
                                          resource_->size(), stride,
-                                         raster_source, rect, scale);
+                                         raster_source, rect, rect, scale);
     gpu_memory_buffer->Unmap();
   }
 
@@ -176,9 +176,9 @@ ResourceFormat ZeroCopyTileTaskWorkerPool::GetResourceFormat() {
 }
 
 scoped_ptr<RasterBuffer> ZeroCopyTileTaskWorkerPool::AcquireBufferForRaster(
-    const Resource* resource) {
+    const TileTaskData& data) {
   return make_scoped_ptr<RasterBuffer>(
-      new RasterBufferImpl(resource_provider_, resource));
+      new RasterBufferImpl(resource_provider_, data.resource));
 }
 
 void ZeroCopyTileTaskWorkerPool::ReleaseBufferForRaster(