Record the fraction of the time without user input - Aura only

ui/aura/window_event_dispatcher.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_AURA_WINDOW_EVENT_DISPATCHER_H_
 #define UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/scoped_observer.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/client/capture_delegate.h"
 #include "ui/aura/env_observer.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/event_processor.h"
 #include "ui/events/event_targeter.h"
+#include "ui/events/fraction_of_time_without_user_input_recorder.h"
 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/events/gestures/gesture_types.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace ui {
 class GestureEvent;
 class GestureRecognizer;
 class MouseEvent;
 class TouchEvent;
@@ skipping 204 matching lines @@
   ui::EventDispatchDetails PreDispatchTouchEvent(Window* target,
                                                  ui::TouchEvent* event);
 
   WindowTreeHost* host_;
 
   Window* mouse_pressed_handler_;
   Window* mouse_moved_handler_;
   Window* event_dispatch_target_;
   Window* old_dispatch_target_;
 
+  ui::FractionOfTimeWithoutUserInputRecorder
+      fraction_of_time_without_user_input_recorder_;
+
   bool synthesize_mouse_move_;
 
   // How many move holds are outstanding. We try to defer dispatching
   // touch/mouse moves while the count is > 0.
   int move_hold_count_;
   // The location of |held_move_event_| is in |window_|'s coordinate.
   std::unique_ptr<ui::LocatedEvent> held_move_event_;
 
   // Allowing for reposting of events. Used when exiting context menus.
   std::unique_ptr<ui::LocatedEvent> held_repostable_event_;
@@ skipping 15 matching lines @@
 
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<WindowEventDispatcher> held_event_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcher);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_EVENT_DISPATCHER_H_