Reland (2): cc: Make tile manager object persist for the length of LTHI.

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 f7a3e99be0a9251320fb340c8f7d89e3165c1039..618b2d10c840b3a0eaf82e6a81f03795d1bb33fc 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -229,7 +229,7 @@ class CC_EXPORT LayerTreeHostImpl
   void DidAnimateScrollOffset();
   void SetViewportDamage(const gfx::Rect& damage_rect);
 
-  virtual void PrepareTiles();
+  virtual bool PrepareTiles();
 
   // Returns DRAW_SUCCESS unless problems occured preparing the frame, and we
   // should try to avoid displaying the frame. If PrepareToDraw is called,
@@ -580,8 +580,8 @@ class CC_EXPORT LayerTreeHostImpl
       const gfx::Vector2dF& viewport_delta);
 
   void CreateAndSetRenderer();
-  void CreateAndSetTileManager();
-  void DestroyTileManager();
+  void CleanUpTileManager();
+  void RecreateTileManagerResources();
   void ReleaseTreeResources();
   void RecreateTreeResources();