SetNeedsRedraw directly when updating a visible tile.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 157fe00eb67013347d1840a7c9499e392b885fcf..5a28befd3d51cf54b2b8a0deadda4c5d11a3f891 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -82,7 +82,6 @@ class LayerTreeHostImplClient {
   virtual void SetNeedsRedrawOnImplThread() = 0;
   virtual void SetNeedsRedrawRectOnImplThread(const gfx::Rect& damage_rect) = 0;
   virtual void SetNeedsAnimateOnImplThread() = 0;
-  virtual void DidInitializeVisibleTileOnImplThread() = 0;
   virtual void SetNeedsCommitOnImplThread() = 0;
   virtual void SetNeedsManageTilesOnImplThread() = 0;
   virtual void PostAnimationEventsToMainThreadOnImplThread(
@@ -174,7 +173,6 @@ class CC_EXPORT LayerTreeHostImpl
     RenderPassIdHashMap render_passes_by_id;
     const LayerImplList* render_surface_layer_list;
     LayerImplList will_draw_layers;
-    bool contains_incomplete_tile;
     bool has_no_damage;
 
     // RenderPassSink implementation.
@@ -213,9 +211,6 @@ class CC_EXPORT LayerTreeHostImpl
   // immediately if any notifications had been blocked while blocking.
   virtual void BlockNotifyReadyToActivateForTesting(bool block);
 
-  // This allows us to inject DidInitializeVisibleTile events for testing.
-  void DidInitializeVisibleTileForTesting();
-
   // Resets all of the trees to an empty state.
   void ResetTreesForTesting();
 
@@ -237,6 +232,7 @@ class CC_EXPORT LayerTreeHostImpl
   void NotifyTileStateChanged(const Tile* tile) override;
   void BuildRasterQueue(RasterTilePriorityQueue* queue,
                         TreePriority tree_priority) override;
+  void FinishedRasterQueue() override;
   void BuildEvictionQueue(EvictionTilePriorityQueue* queue,
                           TreePriority tree_priority) override;
 
@@ -306,7 +302,6 @@ class CC_EXPORT LayerTreeHostImpl
     return pending_tree_ ? pending_tree_.get() : active_tree_.get();
   }
   virtual void CreatePendingTree();
-  virtual void UpdateVisibleTiles();
   virtual void ActivateSyncTree();
 
   // Shortcuts to layers on the active tree.
@@ -702,8 +697,6 @@ class CC_EXPORT LayerTreeHostImpl
   MicroBenchmarkControllerImpl micro_benchmark_controller_;
   scoped_ptr<TaskGraphRunner> single_thread_synchronous_task_graph_runner_;
 
-  bool need_to_update_visible_tiles_before_draw_;
-
   // Optional callback to notify of new tree activations.
   base::Closure tree_activation_callback_;
 
@@ -717,6 +710,7 @@ class CC_EXPORT LayerTreeHostImpl
   std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
 
   bool requires_high_res_to_draw_;
+  bool active_visible_tile_is_top_of_raster_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };