Expose synthetic delays through the GPU benchmarking extension

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index f355732ca8e65c01647208d2616c25ef18cf4234..2281ce962738eac89a349da96ef29cf90c71f474 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/debug/trace_event_synthetic_delay.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
@@ -71,6 +72,7 @@ class RenderWidgetTest;
 class ResizingModeSelector;
 struct ContextMenuParams;
 struct GpuRenderingStats;
+struct SyntheticDelayConfiguration;
 struct WebPluginGeometry;
 
 // RenderWidget provides a communication bridge between a WebWidget and
@@ -185,6 +187,13 @@ class CONTENT_EXPORT RenderWidget
       scoped_ptr<SyntheticGestureParams> gesture_params,
       const SyntheticGestureCompletionCallback& callback);
 
+  // Configure synthetic delays across all processes. Once all processes have
+  // acknowledged the new delay configuration, |callback| will be called back.
+  typedef base::Callback<void()> SyntheticDelayConfigurationCallback;
+  void ConfigureSyntheticDelays(
+      const std::vector<content::SyntheticDelayConfiguration>& delays,
+      const SyntheticDelayConfigurationCallback& callback);
+
   // Close the underlying WebWidget.
   virtual void Close();
 
@@ -345,6 +354,7 @@ class CONTENT_EXPORT RenderWidget
                      const gfx::Size& desired_size);
   void OnRepaint(gfx::Size size_to_paint);
   void OnSyntheticGestureCompleted();
+  void OnConfigureSyntheticDelaysAck();
   void OnSetTextDirection(blink::WebTextDirection direction);
   void OnGetFPS();
   void OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
@@ -747,6 +757,8 @@ class CONTENT_EXPORT RenderWidget
   std::queue<SyntheticGestureCompletionCallback>
       pending_synthetic_gesture_callbacks_;
 
+  SyntheticDelayConfigurationCallback pending_delay_configuration_;
+
   // Specified whether the compositor will run in its own thread.
   bool is_threaded_compositing_enabled_;