Enable unified GR by default in Aura.

content/public/test/browser_test_utils.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/public/test/browser_test_utils.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/path_service.h"
 #include "base/process/kill.h"
@@ skipping 248 matching lines @@
   web_contents->GetRenderViewHost()->ForwardMouseEvent(mouse_event);
 }
 
 void SimulateTapAt(WebContents* web_contents, const gfx::Point& point) {
   const double kTapDurationSeconds =
       0.5 * (ui::GestureConfiguration::
                  min_touch_down_duration_in_seconds_for_click() +
              ui::GestureConfiguration::
                  max_touch_down_duration_in_seconds_for_click());
   SyntheticWebTouchEvent touch;
-  touch.timeStampSeconds = 0;
+  touch.SetTimestamp(base::TimeTicks::Now() - base::TimeTicks());

[Paweł Hajdan Jr., 2014/06/05 10:17:53]

nit: Could you add a comment why we do this weird TimeTicks - TimeTicks dance?

[tdresser, 2014/06/05 12:05:08]

Done.

   touch.PressPoint(point.x(), point.y());
   RenderWidgetHostImpl* widget_host =
       RenderWidgetHostImpl::From(web_contents->GetRenderViewHost());
   widget_host->ForwardTouchEvent(touch);
-  touch.timeStampSeconds = kTapDurationSeconds;
+  touch.timeStampSeconds += kTapDurationSeconds;
   touch.ReleasePoint(0);
   widget_host->ForwardTouchEvent(touch);
 }
 
 void SimulateKeyPress(WebContents* web_contents,
                       ui::KeyboardCode key_code,
                       bool control,
                       bool shift,
                       bool alt,
                       bool command) {
@@ skipping 407 matching lines @@
   }
   // The queue should not be empty, unless we were quit because of a timeout.
   if (message_queue_.empty())
     return false;
   *message = message_queue_.front();
   message_queue_.pop();
   return true;
 }
 
 }  // namespace content