Enable using system proxy resolver for android webview.

android_webview/browser/net/aw_url_request_context_getter.cc

 // 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.
 
 #include "android_webview/browser/net/aw_url_request_context_getter.h"
 
 #include <vector>
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_content_browser_client.h"
@@ skipping 182 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(!url_request_context_);
 
   net::URLRequestContextBuilder builder;
   builder.set_user_agent(GetUserAgent());
   AwNetworkDelegate* aw_network_delegate = new AwNetworkDelegate();
   builder.set_network_delegate(aw_network_delegate);
 #if !defined(DISABLE_FTP_SUPPORT)
   builder.set_ftp_enabled(false);  // Android WebView does not support ftp yet.
 #endif
-  if (data_reduction_proxy_config_service_.get()) {
-    builder.set_proxy_config_service(
-        data_reduction_proxy_config_service_.release());
-  } else {
-    builder.set_proxy_config_service(
-        net::ProxyService::CreateSystemProxyConfigService(
-            GetNetworkTaskRunner(), NULL /* Ignored on Android */ ));
-  }
+  DCHECK(data_reduction_proxy_config_service_.get());
+  // Android provides a local HTTP proxy that handles all the proxying.
+  // Create the proxy without a resolver since we rely on this local HTTP proxy.
+  // TODO(sgurun) is this behavior guaranteed through SDK?
+  builder.set_proxy_service(
+      net::ProxyService::CreateWithoutProxyResolver(
+          data_reduction_proxy_config_service_.release(),
+          net_log_.get()));
   builder.set_accept_language(net::HttpUtil::GenerateAcceptLanguageHeader(
       AwContentBrowserClient::GetAcceptLangsImpl()));
   builder.set_net_log(net_log_.get());
   builder.set_channel_id_enabled(false);
   ApplyCmdlineOverridesToURLRequestContextBuilder(&builder);
 
   url_request_context_.reset(builder.Build());
   // TODO(mnaganov): Fix URLRequestContextBuilder to use proper threads.
   net::HttpNetworkSession::Params network_session_params;
 
@@ skipping 70 matching lines @@
 net::NetLog* AwURLRequestContextGetter::GetNetLog() {
   return net_log_.get();
 }
 
 void AwURLRequestContextGetter::SetKeyOnIO(const std::string& key) {
   DCHECK(data_reduction_proxy_auth_request_handler_);
   data_reduction_proxy_auth_request_handler_->InitAuthentication(key);
 }
 
 }  // namespace android_webview