Navigation transitions: Block first response until after transitions have run.

content/content_common.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',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 426 matching lines @@
       'common/set_process_title_linux.h',
       'common/socket_stream.h',
       'common/socket_stream_handle_data.h',
       'common/socket_stream_messages.h',
       'common/speech_recognition_messages.h',
       'common/ssl_status_serialization.cc',
       'common/ssl_status_serialization.h',
       'common/swapped_out_messages.cc',
       'common/swapped_out_messages.h',
       'common/text_input_client_messages.h',
+      'common/transition_request_messages.h',
       'common/url_schemes.cc',
       'common/url_schemes.h',
       'common/user_agent.cc',
       'common/user_agent_ios.mm',
       'common/utility_messages.h',
       'common/view_message_enums.h',
       'common/view_messages.h',
       'common/webplugin_geometry.cc',
       'common/webplugin_geometry.h',
       'common/websocket.cc',
@@ skipping 330 matching lines @@
         'common/sandbox_linux/bpf_renderer_policy_linux.cc',
         'common/sandbox_linux/bpf_renderer_policy_linux.h',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.cc',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.h',
       ],
     }, {
       'defines': ['USE_SECCOMP_BPF'],
     }],
   ],
 }