cc: Add image decode queue functionality to image manager.

cc/tiles/tile_manager.cc

Index: cc/tiles/tile_manager.cc
diff --git a/cc/tiles/tile_manager.cc b/cc/tiles/tile_manager.cc
index 08796a32f949f1064dec57a5b0a9883a89e990ab..dfe6d75ae63a7da91f0ed5570c861bca7c1e2aec 100644
--- a/cc/tiles/tile_manager.cc
+++ b/cc/tiles/tile_manager.cc
@@ -356,6 +356,7 @@ TileManager::TileManager(TileManagerClient* client,
       all_tiles_that_need_to_be_rasterized_are_scheduled_(true),
       did_check_for_completed_tasks_since_last_schedule_tasks_(true),
       did_oom_on_last_assign_(false),
+      image_controller_(task_runner),
       more_tiles_need_prepare_check_notifier_(
           task_runner_,
           base::Bind(&TileManager::CheckIfMoreTilesNeedToBePrepared,
@@ -1046,6 +1047,10 @@ void TileManager::OnRasterTaskCompleted(
   client_->NotifyTileStateChanged(tile);
 }
 
+void TileManager::NotifyFrameFinished() {
+  image_controller_.NotifyFrameFinished();
+}
+
 ScopedTilePtr TileManager::CreateTile(const Tile::CreateInfo& info,
                                       int layer_id,
                                       int source_frame_number,