Mojo: Generalize blink::URLRequest -> mojo::URLRequest conversion, and use it

mojo/mojo_services.gypi

 # Copyright (c) 2014 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.
 
 {
   'targets': [
     {
       # GN version: //mojo/services/dbus_echo:bindings
       'target_name': 'mojo_echo_bindings',
       'type': 'static_library',
@@ skipping 30 matching lines @@
       ],
       'include_dirs': [
         'third_party/WebKit'
       ],
       'sources': [
         'public/cpp/application/lib/mojo_main_chromium.cc',
         'services/html_viewer/blink_input_events_type_converters.cc',
         'services/html_viewer/blink_input_events_type_converters.h',
         'services/html_viewer/blink_platform_impl.cc',
         'services/html_viewer/blink_platform_impl.h',
+        'services/html_viewer/blink_url_request_type_converters.cc',
+        'services/html_viewer/blink_url_request_type_converters.h',
         'services/html_viewer/html_viewer.cc',
         'services/html_viewer/html_document_view.cc',
         'services/html_viewer/html_document_view.h',
         'services/html_viewer/webcookiejar_impl.cc',
         'services/html_viewer/webcookiejar_impl.h',
         'services/html_viewer/webmimeregistry_impl.cc',
         'services/html_viewer/webmimeregistry_impl.h',
         'services/html_viewer/webstoragenamespace_impl.cc',
         'services/html_viewer/webstoragenamespace_impl.h',
         'services/html_viewer/webthemeengine_impl.cc',
@@ skipping 864 matching lines @@
             'mojo_echo_bindings',
           ],
           'sources': [
             'services/dbus_echo/dbus_echo_service.cc',
           ],
         },
       ],
     }],
   ],
 }