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

ash/system/ime/tray_ime_chromeos_unittest.cc

 // Copyright 2014 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/system/ime/tray_ime_chromeos.h"
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/system_tray_notifier.h"
@@ skipping 124 matching lines @@
   EXPECT_TRUE(default_view()->visible());
 }
 
 // Tests that clicking on the keyboard toggle causes the virtual keyboard
 // to toggle between enabled and disabled.
 TEST_F(TrayIMETest, PerformActionOnDetailedView) {
   SetIMELength(0);
   test::VirtualKeyboardTestHelper::SuppressKeyboard();
   EXPECT_FALSE(keyboard::IsKeyboardEnabled());
   views::View* toggle = GetScrollChildView(0);
-  ui::GestureEvent tap(0, 0, 0, base::TimeDelta(),
+  ui::GestureEvent tap(0, 0, 0, base::TimeTicks(),
                        ui::GestureEventDetails(ui::ET_GESTURE_TAP));
   // Enable the keyboard.
   toggle->OnGestureEvent(&tap);
   EXPECT_TRUE(keyboard::IsKeyboardEnabled());
   EXPECT_TRUE(default_view()->visible());
   // With no IMEs the toggle should be the first child.
   toggle = GetScrollChildView(0);
   // Clicking again should disable the keyboard.
-  tap = ui::GestureEvent(0, 0, 0, base::TimeDelta(),
+  tap = ui::GestureEvent(0, 0, 0, base::TimeTicks(),
                          ui::GestureEventDetails(ui::ET_GESTURE_TAP));
   toggle->OnGestureEvent(&tap);
   EXPECT_FALSE(keyboard::IsKeyboardEnabled());
   EXPECT_TRUE(default_view()->visible());
 }
 
 }  // namespace ash