Make it possible to cancel commits following an animation

cc/trees/layer_tree_host.cc

 // 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.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 721 matching lines @@
 
   if (!root_layer())
     return false;
 
   DCHECK(!root_layer()->parent());
 
   bool result = UpdateLayers(root_layer(), queue);
 
   micro_benchmark_controller_.DidUpdateLayers();
 
-  return result;
+  return result || next_commit_forces_redraw_;
 }
 
 static Layer* FindFirstScrollableLayer(Layer* layer) {
   if (!layer)
     return NULL;
 
   if (layer->scrollable())
     return layer;
 
   for (size_t i = 0; i < layer->children().size(); ++i) {
@@ skipping 567 matching lines @@
   swap_promise_list_.push_back(swap_promise.Pass());
 }
 
 void LayerTreeHost::BreakSwapPromises(SwapPromise::DidNotSwapReason reason) {
   for (size_t i = 0; i < swap_promise_list_.size(); i++)
     swap_promise_list_[i]->DidNotSwap(reason);
   swap_promise_list_.clear();
 }
 
 }  // namespace cc