Introduce intercepting and handling devtools messages in the renderer.

content/content_browser.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': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 279 matching lines @@
     'browser/devtools/devtools_manager_impl.cc',
     'browser/devtools/devtools_manager_impl.h',
     'browser/devtools/devtools_netlog_observer.cc',
     'browser/devtools/devtools_netlog_observer.h',
     'browser/devtools/devtools_protocol.cc',
     'browser/devtools/devtools_protocol.h',
     'browser/devtools/devtools_tracing_handler.h',
     'browser/devtools/devtools_tracing_handler.cc',
     'browser/devtools/render_view_devtools_agent_host.cc',
     'browser/devtools/render_view_devtools_agent_host.h',
+    'browser/devtools/renderer_overrides_handler.cc',
+    'browser/devtools/renderer_overrides_handler.h',
     'browser/devtools/worker_devtools_manager.cc',
     'browser/devtools/worker_devtools_manager.h',
     'browser/devtools/worker_devtools_message_filter.cc',
     'browser/devtools/worker_devtools_message_filter.h',
     'browser/device_monitor_linux.cc',
     'browser/device_monitor_linux.h',
     'browser/device_monitor_mac.h',
     'browser/device_monitor_mac.mm',
     'browser/device_orientation/accelerometer_mac.cc',
     'browser/device_orientation/accelerometer_mac.h',
@@ skipping 905 matching lines @@
         ['exclude', '^browser/speech/'],
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }