Implement accessibility support for CSS-transformed iframes.

ui/accessibility/accessibility.gyp

 # Copyright 2013 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,
   },
 
   'targets': [
     {
       'target_name': 'accessibility',
       'type': '<(component)',
       'export_dependent_settings': [
         'ax_gen',
+        '../../skia/skia.gyp:skia',
       ],
       'hard_dependency': 1,
       'dependencies': [
         '../../base/base.gyp:base',
+        '../../skia/skia.gyp:skia',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         'ax_gen',
       ],
       'defines': [
         'ACCESSIBILITY_IMPLEMENTATION',
       ],
       'sources': [
         # All .cc, .h under accessibility, except unittests
         'ax_node.cc',
@@ skipping 64 matching lines @@
             'ui_accessibility_java'
           ],
         }],
       ],
     },
     {
       'target_name': 'accessibility_test_support',
       'type': 'static_library',
       'dependencies': [
         '../../base/base.gyp:base',
+        '../../skia/skia.gyp:skia',
         'accessibility'
       ],
       'sources': [
         'platform/test_ax_node_wrapper.cc',
         'platform/test_ax_node_wrapper.h',
         'tree_generator.cc',
         'tree_generator.h',
       ]
     },
     {
@@ skipping 97 matching lines @@
           'type': 'none',
           'variables': {
             'source_file': 'ax_enums.idl',
           },
           'includes': [ '../../build/android/java_cpp_enum.gypi' ],
         },
       ],
     }],
   ],
 }