[Android WebView] Call shouldInterceptRequest on a background thread

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"
-#include "android_webview/browser/aw_request_interceptor.h"
 #include "android_webview/browser/net/aw_http_user_agent_settings.h"
 #include "android_webview/browser/net/aw_network_delegate.h"
+#include "android_webview/browser/net/aw_request_interceptor.h"
 #include "android_webview/browser/net/aw_url_request_job_factory.h"
 #include "android_webview/browser/net/init_native_callback.h"
 #include "android_webview/common/aw_content_client.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/worker_pool.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h"
@@ skipping 253 matching lines @@
   return net_log_.get();
 }
 
 void AwURLRequestContextGetter::SetKeyOnIO(const std::string& key) {
   DCHECK(AwBrowserContext::GetDefault()->GetDataReductionProxyIOData());
   AwBrowserContext::GetDefault()->GetDataReductionProxyIOData()->
       request_options()->SetKeyOnIO(key);
 }
 
 }  // namespace android_webview