Implement the content/renderer and content/browser part of the Device Motion API.

content/content_common.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../media/media.gyp:media',
     '../net/net.gyp:net',
@@ skipping 159 matching lines @@
     'common/font_config_ipc_linux.cc',
     'common/font_config_ipc_linux.h',
     'common/font_list.cc',
     'common/font_list.h',
     'common/font_list_android.cc',
     'common/font_list_mac.mm',
     'common/font_list_pango.cc',
     'common/font_list_win.cc',
     'common/gamepad_hardware_buffer.h',
     'common/gamepad_messages.h',
-    'common/gamepad_seqlock.cc',
-    'common/gamepad_seqlock.h',
     'common/gamepad_user_gesture.cc',
     'common/gamepad_user_gesture.h',
     'common/geolocation_messages.h',
     'common/gpu/client/command_buffer_proxy_impl.cc',
     'common/gpu/client/command_buffer_proxy_impl.h',
     'common/gpu/client/context_provider_command_buffer.cc',
     'common/gpu/client/context_provider_command_buffer.h',
     'common/gpu/client/gl_helper.cc',
     'common/gpu/client/gl_helper.h',
     'common/gpu/client/gl_helper_scaling.cc',
@@ skipping 79 matching lines @@
     'common/media/video_capture_messages.h',
     'common/media/webrtc_identity_messages.h',
     'common/memory_benchmark_messages.h',
     'common/message_router.cc',
     'common/message_router.h',
     'common/mime_registry_messages.h',
     'common/navigation_gesture.h',
     'common/net/url_fetcher.cc',
     'common/net/url_request_user_data.cc',
     'common/net/url_request_user_data.h',
+    'common/one_writer_seqlock.cc',
+    'common/one_writer_seqlock.h',
     'common/p2p_messages.h',
     'common/p2p_sockets.h',
     'common/page_state_serialization.cc',
     'common/page_state_serialization.h',
     'common/page_zoom.cc',
     'common/pepper_messages.h',
     'common/pepper_plugin_registry.cc',
     'common/pepper_plugin_registry.h',
     'common/pepper_renderer_instance_data.cc',
     'common/pepper_renderer_instance_data.h',
@@ skipping 251 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }