Make RenderViewImpl::OnForceRedraw more robust

cc/trees/layer_tree_impl.h

 // Copyright 2012 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_IMPL_H_
 #define CC_TREES_LAYER_TREE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 340 matching lines @@
   // may only be queued on the active tree.
   //
   // An active tree pinned swap promise will see only DidSwap() or
   // DidNotSwap(SWAP_FAILS). No DidActivate() will be seen because
   // that has already happened prior to queueing of the swap promise.
   //
   // Pinned active tree swap promises will not be broken prematurely
   // on the active tree if a new tree is activated.
   void QueuePinnedSwapPromise(std::unique_ptr<SwapPromise> swap_promise);
 
-  // Take the |new_swap_promise| and append it to |swap_promise_list_|.
+  // Takes the |new_swap_promises| and appends it to |swap_promise_list_|.

[danakj, 2016/08/10 01:04:15]

"appends them" while youre fixing this

   void PassSwapPromises(
-      std::vector<std::unique_ptr<SwapPromise>>* new_swap_promise);
+      std::vector<std::unique_ptr<SwapPromise>>* new_swap_promises);
   void FinishSwapPromises(CompositorFrameMetadata* metadata);
   void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
 
   void DidModifyTilePriorities();
 
   ResourceId ResourceIdForUIResource(UIResourceId uid) const;
   void ProcessUIResourceRequestQueue();
 
   bool IsUIResourceOpaque(UIResourceId uid) const;
 
@@ skipping 176 matching lines @@
 
   std::unique_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_