cc: Introduce BeginFrame sequence numbers and acknowledgements.

cc/test/fake_layer_tree_host_impl.cc

Index: cc/test/fake_layer_tree_host_impl.cc
diff --git a/cc/test/fake_layer_tree_host_impl.cc b/cc/test/fake_layer_tree_host_impl.cc
index 445b63d364b782fd808591ad8f6d6a1d38228a15..77860aff68ec7f67b55b1cd4f93054fc5f8012b1 100644
--- a/cc/test/fake_layer_tree_host_impl.cc
+++ b/cc/test/fake_layer_tree_host_impl.cc
@@ -40,7 +40,7 @@ FakeLayerTreeHostImpl::FakeLayerTreeHostImpl(
   // Start an impl frame so tests have a valid frame_time to work with.
   base::TimeTicks time_ticks = base::TimeTicks::FromInternalValue(1);
   WillBeginImplFrame(
-      CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, time_ticks));
+      CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, 0, 0, time_ticks));
 }
 
 FakeLayerTreeHostImpl::~FakeLayerTreeHostImpl() {