Deliver IPC messages together with SwapCompositorFrame

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index 2c0efdd594f52f1e8fba4be3f1c8e3dbe806b661..96df2d3a5fb27eeb53a9da3718c27b6339f59144 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -94,6 +94,8 @@ LayerTreeImpl::LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl)
 }
 
 LayerTreeImpl::~LayerTreeImpl() {
+  BreakSwapPromises(SwapPromise::SWAP_FAILS);
+
   // Need to explicitly clear the tree prior to destroying this so that
   // the LayerTreeImpl pointer is still valid in the LayerImpl dtor.
   DCHECK(!root_layer_);
@@ -923,8 +925,6 @@ gfx::Vector2dF LayerTreeImpl::GetDelegatedScrollOffset(LayerImpl* layer) {
 
 void LayerTreeImpl::QueueSwapPromise(scoped_ptr<SwapPromise> swap_promise) {
   DCHECK(swap_promise);
-  if (swap_promise_list_.size() > kMaxQueuedSwapPromiseNumber)
-    BreakSwapPromises(SwapPromise::SWAP_PROMISE_LIST_OVERFLOW);
   swap_promise_list_.push_back(swap_promise.Pass());
 }