ash:Shelf - Added UMA stats for ShelfAlignment

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 <utility>
 #include <vector>
 
@@ skipping 29 matching lines @@
 
 namespace internal {
 
 class DragImageView;
 class LauncherButton;
 class OverflowBubble;
 class OverflowButton;
 class ShelfLayoutManager;
 class ShelfTooltipManager;
 
+extern const int SHELF_ALIGNMENT_UMA_ENUM_VALUE_BOTTOM;
+extern const int SHELF_ALIGNMENT_UMA_ENUM_VALUE_LEFT;
+extern const int SHELF_ALIGNMENT_UMA_ENUM_VALUE_RIGHT;
+extern const int SHELF_ALIGNMENT_UMA_ENUM_VALUE_COUNT;
+
 class ASH_EXPORT ShelfView : public views::View,
                              public LauncherModelObserver,
                              public views::ButtonListener,
                              public LauncherButtonHost,
                              public views::ContextMenuController,
                              public views::FocusTraversable,
                              public views::BoundsAnimatorObserver,
                              public app_list::ApplicationDragAndDropHost {
  public:
   ShelfView(LauncherModel* model,
@@ skipping 357 matching lines @@
   // Holds ShelfLayoutManager.
   ShelfLayoutManager* layout_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfView);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_VIEW_H_