Add a NavigationThrottle to the public content/ interface

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',
     '../components/url_formatter/url_formatter.gyp:url_formatter',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
@@ skipping 168 matching lines @@
       'public/browser/message_port_delegate.h',
       'public/browser/message_port_provider.h',
       'public/browser/mojo_app_connection.h',
       'public/browser/native_web_keyboard_event.h',
       'public/browser/navigation_controller.cc',
       'public/browser/navigation_controller.h',
       'public/browser/navigation_details.cc',
       'public/browser/navigation_details.h',
       'public/browser/navigation_entry.h',
       'public/browser/navigation_handle.h',
+      'public/browser/navigation_throttle.h',
+      'public/browser/navigation_throttle.cc',
       'public/browser/navigation_type.h',
       'public/browser/navigator_connect_context.h',
       'public/browser/navigator_connect_service_factory.h',
       'public/browser/notification_database_data.h',
       'public/browser/notification_details.h',
       'public/browser/notification_event_dispatcher.h',
       'public/browser/notification_observer.h',
       'public/browser/notification_registrar.cc',
       'public/browser/notification_registrar.h',
       'public/browser/notification_service.h',
@@ skipping 761 matching lines @@
       'browser/loader/cross_site_resource_handler.h',
       'browser/loader/detachable_resource_handler.cc',
       'browser/loader/detachable_resource_handler.h',
       'browser/loader/global_routing_id.h',
       'browser/loader/layered_resource_handler.cc',
       'browser/loader/layered_resource_handler.h',
       'browser/loader/mime_type_resource_handler.cc',
       'browser/loader/mime_type_resource_handler.h',
       'browser/loader/navigation_resource_handler.cc',
       'browser/loader/navigation_resource_handler.h',
+      'browser/loader/navigation_resource_throttle.cc',
+      'browser/loader/navigation_resource_throttle.h',
       'browser/loader/navigation_url_loader.cc',
       'browser/loader/navigation_url_loader.h',
       'browser/loader/navigation_url_loader_delegate.h',
       'browser/loader/navigation_url_loader_factory.h',
       'browser/loader/navigation_url_loader_impl.cc',
       'browser/loader/navigation_url_loader_impl.h',
       'browser/loader/navigation_url_loader_impl_core.cc',
       'browser/loader/navigation_url_loader_impl_core.h',
       'browser/loader/power_save_block_resource_throttle.cc',
       'browser/loader/power_save_block_resource_throttle.h',
@@ skipping 1167 matching lines @@
       'sources': [
         'browser/vr/vr_device.cc',
         'browser/vr/vr_device.h',
         'browser/vr/vr_device_manager.cc',
         'browser/vr/vr_device_manager.h',
         'browser/vr/vr_device_provider.h',
       ]
     }],
   ],
 }