Start work on GN build for content/common

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': [
@@ skipping 24 matching lines @@
         'ax_text_utils.cc',
         'ax_text_utils.h',
         'ax_tree.cc',
         'ax_tree.h',
         'ax_tree_serializer.cc',
         'ax_tree_serializer.h',
         'ax_tree_source.h',
         'ax_tree_update.cc',
         'ax_tree_update.h',
         'ax_view_state.cc',
-        'ax_view_state.cc',
+        'ax_view_state.h',
       ]
     },
     {
       'target_name': 'accessibility_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:run_all_unittests',
         '../../testing/gtest.gyp:gtest',
         '../gfx/gfx.gyp:gfx',
@@ skipping 31 matching lines @@
         ],
         'non_compiled_schema_files': [],
         'cc_dir': 'ui/accessibility',
         # TODO(dtseng): Change this once all files under ui/accessibility
         # namespaced under ui::ax.
         'root_namespace': '',
       },
     },
   ],
 }