Move most of ui/views/drag_utils to ui/base/dragdrop so it can be used outside of views. I tried to…

ui/views/views.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
 
   'target_defaults': {
     'conditions': [
@@ skipping 45 matching lines @@
         'background.cc',
         'background.h',
         'border.cc',
         'border.h',
         'bubble/bubble_border.cc',
         'bubble/bubble_border.h',
         'bubble/bubble_delegate.cc',
         'bubble/bubble_delegate.h',
         'bubble/bubble_frame_view.cc',
         'bubble/bubble_frame_view.h',
+        'button_drag_utils.cc',
+        'button_drag_utils.h',
         'context_menu_controller.h',
         'controls/button/button.cc',
         'controls/button/button.h',
         'controls/button/button_dropdown.cc',
         'controls/button/button_dropdown.h',
         'controls/button/checkbox.cc',
         'controls/button/checkbox.h',
         'controls/button/custom_button.cc',
         'controls/button/custom_button.h',
         'controls/button/image_button.cc',
@@ skipping 168 matching lines @@
         'controls/tree/tree_view.h',
         'controls/tree/tree_view_controller.cc',
         'controls/tree/tree_view_controller.h',
         'controls/tree/tree_view_views.cc',
         'controls/tree/tree_view_views.h',
         'controls/tree/tree_view_win.cc',
         'controls/tree/tree_view_win.h',
         #'debug_utils.cc',
         #'debug_utils.h',
         'drag_controller.h',
-        'drag_utils.cc',
-        'drag_utils.h',
-        'drag_utils_aura.cc',
-        'drag_utils_gtk.cc',
-        'drag_utils_win.cc',
         'events/event.cc',
         'events/event.h',
         'events/event_aura.cc',
         'events/event_gtk.cc',
         'events/event_win.cc',
         'events/event_x.cc',
         'focus/accelerator_handler.h',
         'focus/accelerator_handler_aura.cc',
         'focus/accelerator_handler_gtk.cc',
         'focus/accelerator_handler_win.cc',
@@ skipping 470 matching lines @@
           'msvs_settings': {
             'VCManifestTool': {
               'AdditionalManifestFiles': 'examples\\views_examples.exe.manifest',
             },
           },
         }],
       ],
     },  # target_name: views_examples_lib
   ],
 }