Added Launcher_SwitchTask UMA user action.

ash/shelf/shelf_view.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 ASH_SHELF_SHELF_VIEW_H_
 #define ASH_SHELF_SHELF_VIEW_H_
 
+#include <string>
 #include <utility>
 #include <vector>
 
 #include "ash/shelf/shelf_button_host.h"
+#include "ash/shelf/shelf_item_delegate.h"
 #include "ash/shelf/shelf_model_observer.h"
 #include "ash/wm/gestures/shelf_gesture_handler.h"
 #include "base/observer_list.h"
 #include "ui/app_list/views/app_list_drag_and_drop_host.h"
 #include "ui/views/animation/bounds_animator_observer.h"
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/view.h"
 #include "ui/views/view_model.h"
@@ skipping 247 matching lines @@
                                Pointer pointer,
                                bool canceled) override;
   void MouseMovedOverButton(views::View* view) override;
   void MouseEnteredButton(views::View* view) override;
   void MouseExitedButton(views::View* view) override;
   base::string16 GetAccessibleName(const views::View* view) override;
 
   // Overridden from views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
+  // Records UMA statistics for the input source when an icon was activated.
+  void RecordIconActivatedSource(const ui::Event& event);
+
+  // Records UMA statistics for the action performed by activating an icon.
+  void RecordIconActivatedAction(
+      ShelfItemDelegate::PerformedAction performed_action);
+
   // Show the list of all running items for this |item|. It will return true
   // when the menu was shown and false if there were no possible items to
   // choose from. |source| specifies the view which is responsible for showing
   // the menu, and the bubble will point towards it.
   // The |event_flags| are the flags of the event which triggered this menu.
   bool ShowListMenuForView(const ShelfItem& item,
                            views::View* source,
                            const ui::Event& event);
 
   // Overridden from views::ContextMenuController:
@@ skipping 155 matching lines @@
   // check if a repost event occurs on the same shelf item as previous one. If
   // so, the repost event should be ignored.
   int last_pressed_index_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_VIEW_H_