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

cc/trees/layer_tree_host_unittest.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 "base/auto_reset.h"
 #include "base/synchronization/lock.h"
@@ skipping 2689 matching lines @@
     EXPECT_EQ(commit_complete_count_, 2);
   }
 
   int commit_count_;
   int commit_abort_count_;
   int commit_complete_count_;
 };
 
 class LayerTreeHostTestAbortedCommitDoesntStallSynchronousCompositor
     : public LayerTreeHostTestAbortedCommitDoesntStall {
+ protected:
   void InitializeSettings(LayerTreeSettings* settings) override {
     LayerTreeHostTestAbortedCommitDoesntStall::InitializeSettings(settings);
     settings->using_synchronous_renderer_compositor = true;
   }
+
+  void ScheduledActionInvalidateOutputSurface() override {
+    ImplThreadTaskRunner()->PostTask(
+        FROM_HERE,
+        base::Bind(
+            &LayerTreeHostTestAbortedCommitDoesntStallSynchronousCompositor::
+                CallOnDraw,
+            base::Unretained(this)));
+  }
+
+  void CallOnDraw() {
+    // Synchronous compositor does not draw unless told to do so by the output
+    // surface.
+    output_surface()->client()->OnDraw();
+  }
 };
 
 MULTI_THREAD_TEST_F(
     LayerTreeHostTestAbortedCommitDoesntStallSynchronousCompositor);
 
 class LayerTreeHostTestAbortedCommitDoesntStallDisabledVsync
     : public LayerTreeHostTestAbortedCommitDoesntStall {
   void InitializeSettings(LayerTreeSettings* settings) override {
     LayerTreeHostTestAbortedCommitDoesntStall::InitializeSettings(settings);
     settings->throttle_frame_production = false;
@@ skipping 3905 matching lines @@
 
   void AfterTest() override {}
 
  private:
   scoped_refptr<Layer> child_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerPreserveRenderSurfaceFromOutputRequests);
 
 }  // namespace cc