Move HoverButton and HoverImageButton from chrome/browser/ui/cocoa/ to ui/base/cocoa.

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 566 matching lines @@
         'browser/ui/cocoa/global_error_bubble_controller.h',
         'browser/ui/cocoa/global_error_bubble_controller.mm',
         'browser/ui/cocoa/gradient_button_cell.h',
         'browser/ui/cocoa/gradient_button_cell.mm',
         'browser/ui/cocoa/history_menu_bridge.h',
         'browser/ui/cocoa/history_menu_bridge.mm',
         'browser/ui/cocoa/history_menu_cocoa_controller.h',
         'browser/ui/cocoa/history_menu_cocoa_controller.mm',
         'browser/ui/cocoa/history_overlay_controller.h',
         'browser/ui/cocoa/history_overlay_controller.mm',
-        'browser/ui/cocoa/hover_button.h',
-        'browser/ui/cocoa/hover_button.mm',
         'browser/ui/cocoa/hover_close_button.h',
         'browser/ui/cocoa/hover_close_button.mm',
-        'browser/ui/cocoa/hover_image_button.h',
-        'browser/ui/cocoa/hover_image_button.mm',
         'browser/ui/cocoa/hung_renderer_controller.h',
         'browser/ui/cocoa/hung_renderer_controller.mm',
         'browser/ui/cocoa/hyperlink_button_cell.h',
         'browser/ui/cocoa/hyperlink_button_cell.mm',
         'browser/ui/cocoa/hyperlink_text_view.h',
         'browser/ui/cocoa/hyperlink_text_view.mm',
         'browser/ui/cocoa/image_button_cell.h',
         'browser/ui/cocoa/image_button_cell.mm',
         'browser/ui/cocoa/importer/import_lock_dialog_cocoa.mm',
         'browser/ui/cocoa/importer/import_progress_dialog_cocoa.h',
@@ skipping 2270 matching lines @@
         }],
         ['enable_message_center==1', {
           'dependencies': [
             '../ui/message_center/message_center.gyp:message_center',
           ],
         }],
       ],
     },
   ],
 }