Add latency measurement system

content/browser/renderer_host/render_widget_host_unittest.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/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/timer.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/backing_store.h"
@@ skipping 638 matching lines @@
   void ReleaseTouchPoint(int index) {
     CHECK(index >= 0 && index < touch_event_.touchesLengthCap);
     touch_event_.touches[index].state = WebKit::WebTouchPoint::StateReleased;
     touch_event_.type = WebInputEvent::TouchEnd;
   }
 
   const WebInputEvent* GetInputEventFromMessage(const IPC::Message& message) {
     PickleIterator iter(message);
     const char* data;
     int data_length;
+    int64 input_number;
+    if (!message.ReadInt64(&iter, &input_number))
+      return NULL;
     if (!message.ReadData(&iter, &data, &data_length))
       return NULL;
     return reinterpret_cast<const WebInputEvent*>(data);
   }
 
   MessageLoopForUI message_loop_;
 
   scoped_ptr<TestBrowserContext> browser_context_;
   RenderWidgetHostProcess* process_;  // Deleted automatically by the widget.
   scoped_ptr<MockRenderWidgetHostDelegate> delegate_;
@@ skipping 2587 matching lines @@
   EXPECT_EQ(1U, host_->GestureEventLastQueueEventSize());
   EXPECT_EQ(0U, host_->GestureEventDebouncingQueueSize());
 
   SendInputEventACK(WebKit::WebInputEvent::GestureScrollEnd, false);
   EXPECT_EQ(0U, process_->sink().message_count());
   EXPECT_EQ(0U, host_->GestureEventLastQueueEventSize());
   EXPECT_EQ(0U, host_->GestureEventDebouncingQueueSize());
 }
 
 }  // namespace content