cc: Use BeginFrameArgs

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 ae6f3c1cadaca0ed3225606d1335050d717752e0..38941492f547c6cccf51f892add067e56d336cbe 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -61,6 +61,7 @@ class LayerTreeHostImplClient {
   virtual void OnSwapBuffersCompleteOnImplThread() = 0;
   virtual void BeginFrameOnImplThread(const BeginFrameArgs& args) = 0;
   virtual void OnCanDrawStateChanged(bool can_draw) = 0;
+  virtual void NotifyReadyToActivate() = 0;
   virtual void OnHasPendingTreeStateChanged(bool has_pending_tree) = 0;
   virtual void SetNeedsRedrawOnImplThread() = 0;
   virtual void SetNeedsRedrawRectOnImplThread(gfx::Rect damage_rect) = 0;
@@ -247,6 +248,7 @@ class CC_EXPORT LayerTreeHostImpl
   virtual void CreatePendingTree();
   void UpdateVisibleTiles();
   virtual void ActivatePendingTreeIfNeeded();
+  virtual void ActivatePendingTree();
 
   // Shortcuts to layers on the active tree.
   LayerImpl* RootLayer() const;
@@ -389,7 +391,6 @@ class CC_EXPORT LayerTreeHostImpl
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation);
-  virtual void ActivatePendingTree();
 
   // Virtual for testing.
   virtual void AnimateLayers(base::TimeTicks monotonic_time,
@@ -458,6 +459,7 @@ class CC_EXPORT LayerTreeHostImpl
   UIResourceMap ui_resource_map_;
 
   scoped_ptr<OutputSurface> output_surface_;
+  bool output_surface_lost_;
 
   // |resource_provider_| and |tile_manager_| can be NULL, e.g. when using tile-
   // free rendering - see OutputSurface::ForcedDrawToSoftwareDevice().