Add support for exporting IPC messages from component DLLs.

content/content_common.gypi

 # Copyright (c) 2011 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': 'content_common',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
+        '../gpu/gpu.gyp:gpu_ipc',
         '../ipc/ipc.gyp:ipc',
         '../media/media.gyp:media',
         '../net/net.gyp:net',
         '../skia/skia.gyp:skia',
         '../third_party/icu/icu.gyp:icuuc',
         '../third_party/npapi/npapi.gyp:npapi',
         '../third_party/WebKit/Source/WebKit/chromium/WebKit.gyp:webkit',
         '../ui/gfx/gl/gl.gyp:gl',
         '../ui/ui.gyp:ui',
         '../webkit/support/webkit_support.gyp:appcache',
@@ skipping 323 matching lines @@
           ],
           'sources': [
             'common/gpu/media/omx_video_decode_accelerator_unittest.cc',
           ],
         }
       ],
     },
    ],
   ],
 }