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

ash/shelf/shelf_button_pressed_metric_tracker_unittest.cc

 // Copyright 2015 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/shelf/shelf_button_pressed_metric_tracker.h"
 
 #include <utility>
 
 #include "ash/shelf/shelf.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 34 matching lines @@
  private:
   static int next_unique_id_;
   int unique_id_;
 
   DISALLOW_COPY_AND_ASSIGN(DummyEvent);
 };
 
 int DummyEvent::next_unique_id_ = 0;
 
 DummyEvent::DummyEvent()
-    : Event(ui::ET_GESTURE_TAP, base::TimeDelta(), 0),
-      unique_id_(next_unique_id_++) {
-}
+    : Event(ui::ET_GESTURE_TAP, base::TimeTicks(), 0),
+      unique_id_(next_unique_id_++) {}
 
 DummyEvent::~DummyEvent() {
 }
 
 // Test fixture for the ShelfButtonPressedMetricTracker class. Relies on
 // AshTestBase to initilize the UserMetricsRecorder and it's dependencies.
 class ShelfButtonPressedMetricTrackerTest : public AshTestBase {
  public:
   static const char*
       kTimeBetweenWindowMinimizedAndActivatedActionsHistogramName;
@@ skipping 87 matching lines @@
   metric_tracker_->ButtonPressed(kDummyEvent, sender, performed_action);
 }
 
 }  // namespace
 
 // Verifies that a Launcher_ButtonPressed_Mouse UMA user action is recorded when
 // a button is pressed by a mouse event.
 TEST_F(ShelfButtonPressedMetricTrackerTest,
        Launcher_ButtonPressed_MouseIsRecordedWhenIconActivatedByMouse) {
   const ui::MouseEvent mouse_event(ui::ET_MOUSE_PRESSED, gfx::Point(),
-                                   gfx::Point(), base::TimeDelta(), 0, 0);
+                                   gfx::Point(), base::TimeTicks(), 0, 0);
 
   base::UserActionTester user_action_tester;
   ButtonPressed(mouse_event);
   EXPECT_EQ(1,
             user_action_tester.GetActionCount("Launcher_ButtonPressed_Mouse"));
 }
 
 // Verifies that a Launcher_ButtonPressed_Touch UMA user action is recorded when
 // a button is pressed by a touch event.
 TEST_F(ShelfButtonPressedMetricTrackerTest,
        Launcher_ButtonPressed_MouseIsRecordedWhenIconActivatedByTouch) {
   const ui::TouchEvent touch_event(ui::ET_GESTURE_TAP, gfx::Point(), 0,
-                                   base::TimeDelta());
+                                   base::TimeTicks());
 
   base::UserActionTester user_action_tester;
   ButtonPressed(touch_event);
   EXPECT_EQ(1,
             user_action_tester.GetActionCount("Launcher_ButtonPressed_Touch"));
 }
 
 // Verifies that a Launcher_LaunchTask UMA user action is recorded when
 // pressing a button causes a new window to be created.
 TEST_F(ShelfButtonPressedMetricTrackerTest,
@@ skipping 104 matching lines @@
 
   histogram_tester.ExpectTotalCount(
       kTimeBetweenWindowMinimizedAndActivatedActionsHistogramName, 1);
   histogram_tester.ExpectBucketCount(
       kTimeBetweenWindowMinimizedAndActivatedActionsHistogramName,
       kTimeDeltaInMilliseconds, 1);
 }
 
 }  // namespace test
 }  // namespace ash