Introduce RenderFrameProxyHost object and use it in RFHM.

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': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 551 matching lines @@
     'browser/frame_host/render_frame_host_delegate.cc',
     'browser/frame_host/render_frame_host_delegate.h',
     'browser/frame_host/render_frame_host_factory.cc',
     'browser/frame_host/render_frame_host_factory.h',
     'browser/frame_host/render_frame_host_impl.cc',
     'browser/frame_host/render_frame_host_impl.h',
     'browser/frame_host/render_frame_host_manager.cc',
     'browser/frame_host/render_frame_host_manager.h',
     'browser/frame_host/render_frame_message_filter.cc',
     'browser/frame_host/render_frame_message_filter.h',
+    'browser/frame_host/render_frame_proxy_host.cc',
+    'browser/frame_host/render_frame_proxy_host.h',
     'browser/frame_host/render_widget_host_view_child_frame.cc',
     'browser/frame_host/render_widget_host_view_child_frame.h',
     'browser/frame_host/render_widget_host_view_guest.cc',
     'browser/frame_host/render_widget_host_view_guest.h',
     'browser/gamepad/gamepad_data_fetcher.h',
     'browser/gamepad/gamepad_platform_data_fetcher.h',
     'browser/gamepad/gamepad_platform_data_fetcher_linux.cc',
     'browser/gamepad/gamepad_platform_data_fetcher_linux.h',
     'browser/gamepad/gamepad_platform_data_fetcher_mac.h',
     'browser/gamepad/gamepad_platform_data_fetcher_mac.mm',
@@ skipping 1169 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }