Add latency measurement system

content/public/test/render_view_test.cc

Index: content/public/test/render_view_test.cc
diff --git a/content/public/test/render_view_test.cc b/content/public/test/render_view_test.cc
index 2ccd54f59942127e6e4d855a619bd1b266cc4569..179923929608f59c0de856bbc69db0684c6f9014 100644
--- a/content/public/test/render_view_test.cc
+++ b/content/public/test/render_view_test.cc
@@ -210,13 +210,13 @@ void RenderViewTest::SendNativeKeyEvent(
 void RenderViewTest::SendWebKeyboardEvent(
     const WebKit::WebKeyboardEvent& key_event) {
   RenderViewImpl* impl = static_cast<RenderViewImpl*>(view_);
-  impl->OnMessageReceived(ViewMsg_HandleInputEvent(0, &key_event, false));
+  impl->OnMessageReceived(ViewMsg_HandleInputEvent(0, 0, &key_event, false));
 }
 
 void RenderViewTest::SendWebMouseEvent(
     const WebKit::WebMouseEvent& mouse_event) {
   RenderViewImpl* impl = static_cast<RenderViewImpl*>(view_);
-  impl->OnMessageReceived(ViewMsg_HandleInputEvent(0, &mouse_event, false));
+  impl->OnMessageReceived(ViewMsg_HandleInputEvent(0, 0, &mouse_event, false));
 }
 
 const char* const kGetCoordinatesScript =
@@ -275,7 +275,7 @@ bool RenderViewTest::SimulateElementClick(const std::string& element_id) {
   mouse_event.y = bounds.CenterPoint().y();
   mouse_event.clickCount = 1;
   scoped_ptr<IPC::Message> input_message(
-      new ViewMsg_HandleInputEvent(0, &mouse_event, false));
+      new ViewMsg_HandleInputEvent(0, 0, &mouse_event, false));
   RenderViewImpl* impl = static_cast<RenderViewImpl*>(view_);
   impl->OnMessageReceived(*input_message);
   return true;