Move ResourceResponse struct into the Content API, since it's used in Chrome. While at it, I also...

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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../gpu/gpu.gyp:gpu_ipc',
     '../ipc/ipc.gyp:ipc',
@@ skipping 197 matching lines @@
     'common/plugin_carbon_interpose_constants_mac.h',
     'common/plugin_messages.h',
     'common/quota_messages.h',
     'common/quota_dispatcher.cc',
     'common/quota_dispatcher.h',
     'common/request_extra_data.cc',
     'common/request_extra_data.h',
     'common/resource_dispatcher.cc',
     'common/resource_dispatcher.h',
     'common/resource_messages.h',
-    'common/resource_response.cc',
-    'common/resource_response.h',
     'common/sandbox_init_mac.cc',
     'common/sandbox_init_win.cc',
     'common/sandbox_mac.h',
     'common/sandbox_mac.mm',
     'common/sandbox_methods_linux.h',
     'common/sandbox_policy.cc',
     'common/sandbox_policy.h',
     'common/section_util_win.cc',
     'common/section_util_win.h',
     'common/sensors.h',
@@ skipping 97 matching lines @@
       ],
       'link_settings': {
         'libraries': [
           '-lEGL',
           '-lGLESv2',
         ],
       },
     }],
   ],
 }