Convert URLLoader to the new proxy design

ppapi/ppapi_proxy.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.
 
 {
   'target_defaults': {
     'variables': {
       'ppapi_proxy_target': 0,
     },
     'target_conditions': [
@@ skipping 101 matching lines @@
           'proxy/ppb_pdf_proxy.cc',
           'proxy/ppb_pdf_proxy.h',
           'proxy/ppb_tcp_server_socket_private_proxy.cc',
           'proxy/ppb_tcp_server_socket_private_proxy.h',
           'proxy/ppb_tcp_socket_private_proxy.cc',
           'proxy/ppb_tcp_socket_private_proxy.h',
           'proxy/ppb_testing_proxy.cc',
           'proxy/ppb_testing_proxy.h',
           'proxy/ppb_udp_socket_private_proxy.cc',
           'proxy/ppb_udp_socket_private_proxy.h',
-          'proxy/ppb_url_loader_proxy.cc',
-          'proxy/ppb_url_loader_proxy.h',
           'proxy/ppb_var_deprecated_proxy.cc',
           'proxy/ppb_var_deprecated_proxy.h',
           'proxy/ppb_video_decoder_proxy.cc',
           'proxy/ppb_video_decoder_proxy.h',
           'proxy/ppb_x509_certificate_private_proxy.cc',
           'proxy/ppb_x509_certificate_private_proxy.h',
           'proxy/ppp_class_proxy.cc',
           'proxy/ppp_class_proxy.h',
           'proxy/ppp_content_decryptor_private_proxy.cc',
           'proxy/ppp_content_decryptor_private_proxy.h',
@@ skipping 23 matching lines @@
           'proxy/proxy_channel.h',
           'proxy/proxy_completion_callback_factory.h',
           'proxy/proxy_module.cc',
           'proxy/proxy_module.h',
           'proxy/proxy_object_var.cc',
           'proxy/proxy_object_var.h',
           'proxy/resource_creation_proxy.cc',
           'proxy/resource_creation_proxy.h',
           'proxy/talk_resource.cc',
           'proxy/talk_resource.h',
+          'proxy/url_loader_resource.cc',
+          'proxy/url_loader_resource.h',
           'proxy/url_request_info_resource.cc',
           'proxy/url_request_info_resource.h',
           'proxy/url_response_info_resource.cc',
           'proxy/url_response_info_resource.h',
           'proxy/var_serialization_rules.h',
           'proxy/video_capture_resource.cc',
           'proxy/video_capture_resource.h',
           'proxy/websocket_resource.cc',
           'proxy/websocket_resource.h',
         ],
@@ skipping 33 matching lines @@
               'proxy/serialized_flash_menu.cc',
               'proxy/talk_resource.cc',
               'proxy/video_capture_resource.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }