Make webkit_user_agent a standalone gyp

webkit/plugins/webkit_plugins.gypi

 # Copyright (c) 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.
 
 {
   'targets': [
     {
       'target_name': 'plugins_common',
       'type': 'static_library',
       'defines': [
@@ skipping 83 matching lines @@
         '<(DEPTH)/media/media.gyp:shared_memory_support',
         '<(DEPTH)/net/net.gyp:net',
         '<(DEPTH)/ppapi/ppapi.gyp:ppapi_c',
         '<(DEPTH)/ppapi/ppapi_internal.gyp:ppapi_shared',
         '<(DEPTH)/printing/printing.gyp:printing',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/ui/gl/gl.gyp:gl',
         '<(DEPTH)/ui/ui.gyp:ui',
         '<(DEPTH)/ui/ui.gyp:ui_resources',
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
+        '<(DEPTH)/third_party/WebKit/Source/WebKit/chromium/WebKit.gyp:webkit',
+        '<(DEPTH)/webkit/common/user_agent/webkit_user_agent.gyp:user_agent',
         '<(DEPTH)/webkit/renderer/compositor_bindings/compositor_bindings.gyp:webkit_compositor_support',
-        '<(DEPTH)/third_party/WebKit/Source/WebKit/chromium/WebKit.gyp:webkit',
         'glue_common',
         'plugins_common',
-        'user_agent',
         'webkit_base',
         'webkit_common',
         'webkit_storage',
       ],
       'sources': [
         # This list contains all .h, .cc, and .mm files in glue except for
         # those in the test subdirectory and those with unittest in in their
         # names.
         '../plugins/npapi/gtk_plugin_container.cc',
         '../plugins/npapi/gtk_plugin_container.h',
@@ skipping 168 matching lines @@
             '<(DEPTH)/third_party/wtl/include',
           ],
           'sources!': [
             'plugins/plugin_stubs.cc',
           ],
         }],
       ],
     }
   ],
 }