Change ui::Event::time_stamp from TimeDelta to TimeTicks

ash/touch/touch_observer_hud_unittest.cc

 // Copyright (c) 2013 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 "ash/touch/touch_observer_hud.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
@@ skipping 275 matching lines @@
                                    const gfx::Point& location,
                                    int touch_id) {
     ui::TouchEvent event(type, location, touch_id, event_time);
     GetInternalTouchHudProjection()->OnTouchEvent(&event);
 
     // Advance time for next event.
     event_time += base::TimeDelta::FromMilliseconds(100);
   }
 
  private:
-  base::TimeDelta event_time;
+  base::TimeTicks event_time;
 
   DISALLOW_COPY_AND_ASSIGN(TouchHudProjectionTest);
 };
 
 // Checks if debug touch HUD is correctly initialized for a single display.
 #if defined(OS_WIN) && !defined(USE_ASH)
 // TODO(msw): Broken on Windows. http://crbug.com/584038
 #define MAYBE_SingleDisplay DISABLED_SingleDisplay
 #else
 #define MAYBE_SingleDisplay SingleDisplay
@@ skipping 301 matching lines @@
 
   SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());
 
   // Disabling projection touch HUD shoud remove it without crashing.
   DisableTouchHudProjection();
   EXPECT_EQ(NULL, GetInternalTouchHudProjection());
 }
 
 }  // namespace ash