SetNeedsRedraw directly when updating a visible tile.

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 217 matching lines @@
 
   // Viewport rect in view space used for tiling prioritization.
   const gfx::Rect ViewportRectForTilePriority() const;
 
   // RendererClient implementation.
   void SetFullRootLayerDamage() override;
 
   // TileManagerClient implementation.
   const std::vector<PictureLayerImpl*>& GetPictureLayers() const override;
   void NotifyReadyToActivate() override;
-  void NotifyTileStateChanged(const Tile* tile) override;
+  void NotifyTileStateChanged(const Tile* tile, bool visible_tile) override;
   void BuildRasterQueue(RasterTilePriorityQueue* queue,
                         TreePriority tree_priority) override;
   void BuildEvictionQueue(EvictionTilePriorityQueue* queue,
                           TreePriority tree_priority) override;
 
   // ScrollbarAnimationControllerClient implementation.
   void PostDelayedScrollbarFade(const base::Closure& start_fade,
                                 base::TimeDelta delay) override;
   void SetNeedsScrollbarAnimationFrame() override;
 
@@ skipping 461 matching lines @@
   std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
 
   bool requires_high_res_to_draw_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_