Set toolbar padding to something appropriate for Metro icons.

ui/ui.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,
   },
   'includes': [
     'ui_resources.gypi',
@@ skipping 209 matching lines @@
         'base/resource/resource_bundle_aurax11.cc',
         'base/resource/resource_bundle_gtk.cc',
         'base/resource/resource_bundle_linux.cc',
         'base/resource/resource_bundle_mac.mm',
         'base/resource/resource_bundle_posix.cc',
         'base/resource/resource_bundle_win.cc',
         'base/resource/resource_bundle_win.h',
         'base/resource/resource_data_dll_win.cc',
         'base/resource/resource_data_dll_win.h',
         'base/resource/resource_handle.h',
+        'base/scale.cc',
+        'base/scale.h',
         'base/text/bytes_formatting.cc',
         'base/text/bytes_formatting.h',
         'base/text/text_elider.cc',
         'base/text/text_elider.h',
         'base/text/utf16_indexing.cc',
         'base/text/utf16_indexing.h',
         'base/theme_provider.cc',
         'base/theme_provider.h',
         'base/touch/touch_factory.cc',
         'base/touch/touch_factory.h',
@@ skipping 492 matching lines @@
                 'shutil.copyfile(\'<(ui_copy_target)\', \'<(ui_copy_dest)\'); ' \
                 'os.chmod(\'<(ui_copy_dest)\', 0700)'
               ]
             }
           ],
         },
       ],
     }],
   ],
 }