Update data reduction proxy statistics prefs less often on desktop

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 221 matching lines @@
   DataReductionProxySettings* data_reduction_proxy_settings =
       browser_context->GetDataReductionProxySettings();
   DCHECK(data_reduction_proxy_settings);
   data_reduction_proxy_auth_request_handler_.reset(
       new data_reduction_proxy::DataReductionProxyAuthRequestHandler(
           data_reduction_proxy::kClientAndroidWebview,
           data_reduction_proxy::kAndroidWebViewProtocolVersion,
           data_reduction_proxy_settings->params(),
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)));
 
+  // Compression statistics are not gathered for WebView, so
+  // DataReductionProxyStatisticsPrefs is not instantiated and passed to the
+  // network delegate.
   aw_network_delegate->set_data_reduction_proxy_params(
       data_reduction_proxy_settings->params());
   aw_network_delegate->set_data_reduction_proxy_auth_request_handler(
       data_reduction_proxy_auth_request_handler_.get());
 #endif
 
   main_http_factory_.reset(main_cache);
   url_request_context_->set_http_transaction_factory(main_cache);
   url_request_context_->set_cookie_store(cookie_store_);
 
@@ skipping 25 matching lines @@
 data_reduction_proxy::DataReductionProxyAuthRequestHandler*
 AwURLRequestContextGetter::GetDataReductionProxyAuthRequestHandler() const {
   return data_reduction_proxy_auth_request_handler_.get();
 }
 
 net::NetLog* AwURLRequestContextGetter::GetNetLog() {
   return net_log_.get();
 }
 
 }  // namespace android_webview