cc: Add MainAndImplFrameTimeDelta UMA.

cc/test/scheduler_test_common.cc

Index: cc/test/scheduler_test_common.cc
diff --git a/cc/test/scheduler_test_common.cc b/cc/test/scheduler_test_common.cc
index b6b1b2b9e7a5f98ec9a5f18ede66e807f48a7574..ef760d2adecdf665697d741bca21d4867d27f5c9 100644
--- a/cc/test/scheduler_test_common.cc
+++ b/cc/test/scheduler_test_common.cc
@@ -67,16 +67,20 @@ TestSyntheticBeginFrameSource::TestSyntheticBeginFrameSource(
 TestSyntheticBeginFrameSource::~TestSyntheticBeginFrameSource() {
 }
 
-scoped_ptr<FakeCompositorTimingHistory> FakeCompositorTimingHistory::Create() {
+scoped_ptr<FakeCompositorTimingHistory> FakeCompositorTimingHistory::Create(
+    bool using_synchronous_renderer_compositor) {
   scoped_ptr<RenderingStatsInstrumentation> rendering_stats_instrumentation =
       RenderingStatsInstrumentation::Create();
   return make_scoped_ptr(new FakeCompositorTimingHistory(
+      using_synchronous_renderer_compositor,
       std::move(rendering_stats_instrumentation)));
 }
 
 FakeCompositorTimingHistory::FakeCompositorTimingHistory(
+    bool using_synchronous_renderer_compositor,
     scoped_ptr<RenderingStatsInstrumentation> rendering_stats_instrumentation)
-    : CompositorTimingHistory(CompositorTimingHistory::NULL_UMA,
+    : CompositorTimingHistory(using_synchronous_renderer_compositor,
+                              CompositorTimingHistory::NULL_UMA,
                               rendering_stats_instrumentation.get()),
       rendering_stats_instrumentation_owned_(
           std::move(rendering_stats_instrumentation)) {}