Support double-tap to click in touch accessibility controller.

ui/aura/test/event_generator.h

 // 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.
 
 #ifndef UI_AURA_TEST_EVENT_GENERATOR_H_
 #define UI_AURA_TEST_EVENT_GENERATOR_H_
 
 #include <list>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.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/point.h"
 
 namespace base {
-class TimeDelta;
+class TickClock;
 }
 
 namespace ui {
 class Event;
 class EventProcessor;
 class KeyEvent;
 class MouseEvent;
 class ScrollEvent;
 class TouchEvent;
 }
@@ skipping 280 matching lines @@
   // TODO(yusukes): Support native_event() on all platforms.
   void ReleaseKey(ui::KeyboardCode key_code, int flags);
 
   // Dispatch the event to the WindowEventDispatcher.
   void Dispatch(ui::Event* event);
 
   void set_current_host(WindowTreeHost* host) {
     current_host_ = host;
   }
 
+  // Specify an alternative tick clock to be used for simulating time in tests.
+  void SetTickClock(scoped_ptr<base::TickClock> tick_clock);
+
+  // Get the current time from the tick clock.
+  base::TimeDelta Now();
+
  private:
   // Dispatch a key event to the WindowEventDispatcher.
   void DispatchKeyEvent(bool is_press, ui::KeyboardCode key_code, int flags);
 
   void UpdateCurrentDispatcher(const gfx::Point& point);
   void PressButton(int flag);
   void ReleaseButton(int flag);
 
   // Convert a point between API's coordinates and
   // |target|'s coordinates.
   void ConvertPointFromTarget(const aura::Window* target,
                               gfx::Point* point) const;
   void ConvertPointToTarget(const aura::Window* target,
                             gfx::Point* point) const;
 
   gfx::Point GetLocationInCurrentRoot() const;
   gfx::Point CenterOfWindow(const Window* window) const;
 
   void DispatchNextPendingEvent();
   void DoDispatchEvent(ui::Event* event, bool async);
 
   scoped_ptr<EventGeneratorDelegate> delegate_;
   gfx::Point current_location_;
   WindowTreeHost* current_host_;
   int flags_;
   bool grab_;
   std::list<ui::Event*> pending_events_;
   // Set to true to cause events to be posted asynchronously.
   bool async_;
+  scoped_ptr<base::TickClock> tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGenerator);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_EVENT_GENERATOR_H_