Make RenderViewImpl::OnForceRedraw more robust

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 9cdc06c38420612cfa00e6914e950e0e73d836f5..41929836552c3c4b06702db90535b713df411ea7 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -336,6 +336,7 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
   // Call this function when you expect there to be a swap buffer.
   // See swap_promise.h for how to use SwapPromise.
   void QueueSwapPromise(std::unique_ptr<SwapPromise> swap_promise);
+  void QueueForcedRedrawSwapPromise(std::unique_ptr<SwapPromise> swap_promise);
 
   void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
 
@@ -510,6 +511,7 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
   void CalculateLCDTextMetricsCallback(Layer* layer);
 
   void NotifySwapPromiseMonitorsOfSetNeedsCommit();
+  void NotifySwapPromiseMonitorsOfSetNeedsForcedRedraw();
 
   void SetPropertyTreesNeedRebuild();
 
@@ -596,6 +598,7 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
   std::unique_ptr<ClientPictureCache> client_picture_cache_;
 
   std::vector<std::unique_ptr<SwapPromise>> swap_promise_list_;
+  std::vector<std::unique_ptr<SwapPromise>> forced_redraw_swap_promises_;
   std::set<SwapPromiseMonitor*> swap_promise_monitor_;
 
   PropertyTrees property_trees_;