Create a new RenderFrameHost per child frame when --site-per-process is enabled.

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 776 matching lines @@
     'browser/renderer_host/compositing_iosurface_transformer_mac.cc',
     'browser/renderer_host/compositing_iosurface_transformer_mac.h',
     'browser/renderer_host/compositor_impl_android.cc',
     'browser/renderer_host/compositor_impl_android.h',
     'browser/renderer_host/database_message_filter.cc',
     'browser/renderer_host/database_message_filter.h',
     'browser/renderer_host/dip_util.cc',
     'browser/renderer_host/dip_util.h',
     'browser/renderer_host/file_utilities_message_filter.cc',
     'browser/renderer_host/file_utilities_message_filter.h',
+    'browser/renderer_host/frame_tree.cc',
+    'browser/renderer_host/frame_tree.h',
+    'browser/renderer_host/frame_tree_node.cc',
+    'browser/renderer_host/frame_tree_node.h',
     'browser/renderer_host/gamepad_browser_message_filter.cc',
     'browser/renderer_host/gamepad_browser_message_filter.h',
     'browser/renderer_host/gpu_message_filter.cc',
     'browser/renderer_host/gpu_message_filter.h',
     'browser/renderer_host/gtk_im_context_wrapper.cc',
     'browser/renderer_host/gtk_im_context_wrapper.h',
     'browser/renderer_host/gtk_key_bindings_handler.cc',
     'browser/renderer_host/gtk_key_bindings_handler.h',
     'browser/renderer_host/gtk_plugin_container.cc',
     'browser/renderer_host/gtk_plugin_container.h',
@@ skipping 147 matching lines @@
     'browser/renderer_host/pepper/pepper_truetype_font_list_mac.mm',
     'browser/renderer_host/pepper/pepper_truetype_font_list_win.cc',
     'browser/renderer_host/pepper/pepper_udp_socket_message_filter.cc',
     'browser/renderer_host/pepper/pepper_udp_socket_message_filter.h',
     'browser/renderer_host/pepper/ssl_context_helper.cc',
     'browser/renderer_host/pepper/ssl_context_helper.h',
     'browser/renderer_host/popup_menu_helper_mac.h',
     'browser/renderer_host/popup_menu_helper_mac.mm',
     'browser/renderer_host/render_frame_host_impl.cc',
     'browser/renderer_host/render_frame_host_impl.h',
+    'browser/renderer_host/render_frame_message_filter.cc',
+    'browser/renderer_host/render_frame_message_filter.h',
     'browser/renderer_host/render_message_filter.cc',
     'browser/renderer_host/render_message_filter.h',
     'browser/renderer_host/render_process_host_impl.cc',
     'browser/renderer_host/render_process_host_impl.h',
     'browser/renderer_host/render_sandbox_host_linux.cc',
     'browser/renderer_host/render_sandbox_host_linux.h',
     'browser/renderer_host/render_view_host_delegate.cc',
     'browser/renderer_host/render_view_host_delegate.h',
     'browser/renderer_host/render_view_host_factory.cc',
     'browser/renderer_host/render_view_host_factory.h',
@@ skipping 140 matching lines @@
     'browser/web_contents/aura/image_window_delegate.cc',
     'browser/web_contents/aura/image_window_delegate.h',
     'browser/web_contents/aura/shadow_layer_delegate.cc',
     'browser/web_contents/aura/shadow_layer_delegate.h',
     'browser/web_contents/aura/window_slider.cc',
     'browser/web_contents/aura/window_slider.h',
     'browser/web_contents/debug_urls.cc',
     'browser/web_contents/debug_urls.h',
     'browser/web_contents/drag_utils_gtk.cc',
     'browser/web_contents/drag_utils_gtk.h',
-    'browser/web_contents/frame_tree_node.cc',
-    'browser/web_contents/frame_tree_node.h',
     'browser/web_contents/interstitial_page_impl.cc',
     'browser/web_contents/interstitial_page_impl.h',
     'browser/web_contents/navigation_controller_impl.cc',
     'browser/web_contents/navigation_controller_impl.h',
     'browser/web_contents/navigation_entry_impl.cc',
     'browser/web_contents/navigation_entry_impl.h',
     'browser/web_contents/render_view_host_manager.cc',
     'browser/web_contents/render_view_host_manager.h',
     'browser/web_contents/touch_editable_impl_aura.cc',
     'browser/web_contents/touch_editable_impl_aura.h',
@@ skipping 393 matching lines @@
         '../third_party/speex/speex.gyp:libspeex',
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }