Change base::TickClock to a ref counted class.

ui/events/test/event_generator.h

 // 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.
 
 #ifndef UI_EVENTS_TEST_EVENT_GENERATOR_H_
 #define UI_EVENTS_TEST_EVENT_GENERATOR_H_
 
 #include <list>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/point.h"
 
 namespace base {
 class TickClock;
 }
@@ skipping 308 matching lines @@
   void ReleaseKey(KeyboardCode key_code, int flags);
 
   // Dispatch the event to the WindowEventDispatcher.
   void Dispatch(Event* event);
 
   void set_current_target(EventTarget* target) {
     current_target_ = target;
   }
 
   // Specify an alternative tick clock to be used for simulating time in tests.
-  void SetTickClock(scoped_ptr<base::TickClock> tick_clock);
+  void SetTickClock(const scoped_refptr<base::TickClock>& tick_clock);
 
   // Get the current time from the tick clock.
   base::TimeDelta Now();
 
   // Default delegate set by a platform-specific GeneratorDelegate singleton.
   static EventGeneratorDelegate* default_delegate;
 
  private:
   // Set up the test context using the delegate.
   void Init(gfx::NativeWindow root_window, gfx::NativeWindow window_context);
@@ skipping 15 matching lines @@
   EventGeneratorDelegate* delegate();
 
   scoped_ptr<EventGeneratorDelegate> delegate_;
   gfx::Point current_location_;
   EventTarget* current_target_;
   int flags_;
   bool grab_;
   std::list<Event*> pending_events_;
   // Set to true to cause events to be posted asynchronously.
   bool async_;
-  scoped_ptr<base::TickClock> tick_clock_;
+  scoped_refptr<base::TickClock> tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGenerator);
 };
 
 }  // namespace test
 }  // namespace ui
 
 #endif  // UI_EVENTS_TEST_EVENT_GENERATOR_H_