Revert "chromeos: Move files in //ash/common to //ash, part 2"

ash/shelf/shelf_button_pressed_metric_tracker.h

-// 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.
-
-#ifndef ASH_SHELF_SHELF_BUTTON_PRESSED_METRIC_TRACKER_H_
-#define ASH_SHELF_SHELF_BUTTON_PRESSED_METRIC_TRACKER_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/shelf/shelf_item_delegate.h"
-#include "base/macros.h"
-#include "base/time/tick_clock.h"
-#include "base/time/time.h"
-#include "ui/events/event.h"
-
-namespace views {
-class Button;
-}  // namespace views
-
-namespace ash {
-
-namespace test {
-class ShelfButtonPressedMetricTrackerTestAPI;
-}  // namespace test
-
-// Tracks UMA metrics based on shelf button press actions. More specifically
-// data is added to the following user actions and histograms:
-//
-//    User Actions:
-//      - Launcher_ButtonPressed_Mouse
-//      - Launcher_ButtonPressed_Touch
-//      - Launcher_LaunchTask
-//      - Launcher_MinimizeTask
-//      - Launcher_SwitchTask
-//    Histograms:
-//      - Ash.Shelf.TimeBetweenWindowMinimizedAndActivatedActions
-//
-class ASH_EXPORT ShelfButtonPressedMetricTracker {
- public:
-  static const char
-      kTimeBetweenWindowMinimizedAndActivatedActionsHistogramName[];
-
-  ShelfButtonPressedMetricTracker();
-  ~ShelfButtonPressedMetricTracker();
-
-  // Records metrics based on the |event|, |sender|, and |performed_action|.
-  void ButtonPressed(const ui::Event& event,
-                     const views::Button* sender,
-                     ShelfAction performed_action);
-
- private:
-  friend class test::ShelfButtonPressedMetricTrackerTestAPI;
-
-  // Records UMA metrics for the input source when a button is pressed.
-  void RecordButtonPressedSource(const ui::Event& event);
-
-  // Records UMA metrics for the action performed when a button is pressed.
-  void RecordButtonPressedAction(ShelfAction performed_action);
-
-  // Records UMA metrics for the elapsed time since the last window minimize
-  // action.
-  void RecordTimeBetweenMinimizedAndActivated();
-
-  // Returns true if a window activation action triggered by |sender| would
-  // be subsequent to the last minimize window action.
-  bool IsSubsequentActivationEvent(const views::Button* sender) const;
-
-  // Caches state data for a window minimized action. The |sender| is the button
-  // that caused the action.
-  void SetMinimizedData(const views::Button* sender);
-
-  // Resets the state data associated with the last window minimize action.
-  void ResetMinimizedData();
-
-  // Time source for performed action times.
-  std::unique_ptr<base::TickClock> tick_clock_;
-
-  // Stores the time of the last window minimize action.
-  base::TimeTicks time_of_last_minimize_;
-
-  // Stores the source button of the last window minimize action.
-  // NOTE: This may become stale and should not be operated on. Not owned.
-  const views::Button* last_minimized_source_button_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShelfButtonPressedMetricTracker);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SHELF_SHELF_BUTTON_PRESSED_METRIC_TRACKER_H_