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

ui/views/controls/button/custom_button_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 "ui/views/controls/button/custom_button.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 270 matching lines @@
   EXPECT_FALSE(button()->canceled());
 }
 
 // No touch on desktop Mac. Tracked in http://crbug.com/445520.
 #if !defined(OS_MACOSX) || defined(USE_AURA)
 
 namespace {
 
 void PerformGesture(CustomButton* button, ui::EventType event_type) {
   ui::GestureEventDetails gesture_details(event_type);
-  base::TimeDelta time_stamp = base::TimeDelta::FromMicroseconds(0);
-  ui::GestureEvent gesture_event(0, 0, 0, time_stamp, gesture_details);
+  ui::GestureEvent gesture_event(0, 0, 0, base::TimeTicks(), gesture_details);
   button->OnGestureEvent(&gesture_event);
 }
 
 }  // namespace
 
 // Tests that gesture events correctly change the button state.
 TEST_F(CustomButtonTest, GestureEventsSetState) {
   aura::test::TestCursorClient cursor_client(
       widget()->GetNativeView()->GetRootWindow());
 
@@ skipping 216 matching lines @@
   button()->OnMouseDragged(ui::MouseEvent(
       ui::ET_MOUSE_PRESSED, center, center, ui::EventTimeForNow(),
       ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON));
 
   EXPECT_EQ(InkDropState::HIDDEN, ink_drop->GetTargetInkDropState());
 
   SetDraggedView(nullptr);
 }
 
 }  // namespace views