cc: Make scheduling be driven by vsync for android webview.

cc/test/layer_tree_test.cc

Index: cc/test/layer_tree_test.cc
diff --git a/cc/test/layer_tree_test.cc b/cc/test/layer_tree_test.cc
index 56ef2c1a2197df72998b8d460e7b16c14f7bf698..eec4cc4d3306d1de24a23dad6d3feae6d079c310 100644
--- a/cc/test/layer_tree_test.cc
+++ b/cc/test/layer_tree_test.cc
@@ -119,6 +119,11 @@ class ThreadProxyForTest : public ThreadProxy {
     test_hooks_->ScheduledActionPrepareTiles();
   }
 
+  void ScheduledActionInvalidateOutputSurface() override {
+    ThreadProxy::ScheduledActionInvalidateOutputSurface();
+    test_hooks_->ScheduledActionInvalidateOutputSurface();
+  }
+
   ThreadProxyForTest(
       TestHooks* test_hooks,
       LayerTreeHost* host,