Add test for RAF-spinning with no damage

chrome/test/perf/rendering/latency_tests.cc

 // Copyright (c) 2012 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 "base/command_line.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
@@ skipping 520 matching lines @@
   test_url += "&delayTimeMS=" + base::IntToString(delay_time_us_ / 1000);
   test_url += "&y=" + base::IntToString(kMouseY);
   return test_url + GetUrlModeString(flags);
 }
 
 void LatencyTest::GetMeanFrameTimeMicros(int* frame_time) const {
   TraceEventVector events;
   // Search for compositor swaps (or UpdateRects in the software path).
   analyzer_->FindEvents(query_swaps_, &events);
   RateStats stats;
-  ASSERT_TRUE(GetRateStats(events, &stats));
+  ASSERT_TRUE(GetRateStats(events, &stats, NULL));
 
   // Check that the number of swaps is close to kNumFrames.
   EXPECT_LT(num_frames_ - num_frames_ / 4, static_cast<int>(events.size()));
   *frame_time = static_cast<int>(stats.mean_us);
 }
 
 void LatencyTest::SendInput() {
   content::RenderViewHost* rvh = browser()->GetSelectedTabContentsWrapper()->
       web_contents()->GetRenderViewHost();
   WebKit::WebMouseEvent mouse_event;
@@ skipping 61 matching lines @@
 INSTANTIATE_TEST_CASE_P(, LatencyTest, ::testing::Values(
     0,
     kInputHeavy,
     kInputHeavy | kInputDirty | kRafHeavy,
     kInputHeavy | kInputDirty | kRafHeavy | kPaintHeavy,
     kInputDirty | kPaintHeavy,
     kInputDirty | kRafHeavy | kPaintHeavy
     ));
 
 }  // namespace