Use TaskRunner passed in to URLRequestContextBuilder only for the cache

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 <utility>
 #include <vector>
 
 #include "android_webview/browser/aw_browser_context.h"
@@ skipping 236 matching lines @@
   builder.set_net_log(net_log_.get());
   builder.SetCookieAndChannelIdStores(base::MakeUnique<AwCookieStoreWrapper>(),
                                       std::move(channel_id_service));
 
   net::URLRequestContextBuilder::HttpCacheParams cache_params;
   cache_params.type =
       net::URLRequestContextBuilder::HttpCacheParams::DISK_SIMPLE;
   cache_params.max_size = 20 * 1024 * 1024;  // 20M
   cache_params.path = cache_path_;
   builder.EnableHttpCache(cache_params);
-  builder.SetFileTaskRunner(
+  builder.SetCacheThreadTaskRunner(
       BrowserThread::GetTaskRunnerForThread(BrowserThread::CACHE));
 
   net::HttpNetworkSession::Params network_session_params;
   ApplyCmdlineOverridesToNetworkSessionParams(&network_session_params);
   builder.set_http_network_session_params(network_session_params);
   builder.SetSpdyAndQuicEnabled(true, false);
 
   std::unique_ptr<net::MappedHostResolver> host_resolver(
       new net::MappedHostResolver(
           net::HostResolver::CreateDefaultResolver(nullptr)));
@@ skipping 70 matching lines @@
   http_auth_preferences_->set_server_whitelist(
       auth_server_whitelist_.GetValue());
 }
 
 void AwURLRequestContextGetter::UpdateAndroidAuthNegotiateAccountType() {
   http_auth_preferences_->set_auth_android_negotiate_account_type(
       auth_android_negotiate_account_type_.GetValue());
 }
 
 }  // namespace android_webview