Trace frame_time for SendBeginFrame

content/browser/renderer_host/render_widget_host_view_android.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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/android/build_info.h"
 #include "base/basictypes.h"
@@ skipping 1301 matching lines @@
 
   if (!observing_root_window_)
     return;
 
   observing_root_window_ = false;
   content_view_core_->GetWindowAndroid()->RemoveObserver(this);
 }
 
 void RenderWidgetHostViewAndroid::SendBeginFrame(base::TimeTicks frame_time,
                                                  base::TimeDelta vsync_period) {
-  TRACE_EVENT0("cc", "RenderWidgetHostViewAndroid::SendBeginFrame");
+  TRACE_EVENT1("cc", "RenderWidgetHostViewAndroid::SendBeginFrame",
+               "frame_time_us", frame_time.ToInternalValue());
   base::TimeTicks display_time = frame_time + vsync_period;
 
   // TODO(brianderson): Use adaptive draw-time estimation.
   base::TimeDelta estimated_browser_composite_time =
       base::TimeDelta::FromMicroseconds(
           (1.0f * base::Time::kMicrosecondsPerSecond) / (3.0f * 60));
 
   base::TimeTicks deadline = display_time - estimated_browser_composite_time;
 
   host_->Send(new ViewMsg_BeginFrame(
@@ skipping 517 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content