Const-ify RefCountedThreadSafe::AddRef and Release.

chrome/browser/net/chrome_url_request_context.cc

 // Copyright (c) 2010 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 "chrome/browser/net/chrome_url_request_context.h"
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/string_number_conversions.h"
@@ skipping 590 matching lines @@
           &ChromeURLRequestContextGetter::GetCookieStoreAsyncHelper,
           &completion,
           &result));
 
   completion.Wait();
   DCHECK(result);
   return result;
 }
 
 scoped_refptr<base::MessageLoopProxy>
-ChromeURLRequestContextGetter::GetIOMessageLoopProxy() {
+ChromeURLRequestContextGetter::GetIOMessageLoopProxy() const {
   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
 }
 
 // static
 ChromeURLRequestContextGetter* ChromeURLRequestContextGetter::CreateOriginal(
     Profile* profile, const FilePath& cookie_store_path,
     const FilePath& disk_cache_path, int cache_size) {
   DCHECK(!profile->IsOffTheRecord());
   return new ChromeURLRequestContextGetter(
       profile,
@@ skipping 351 matching lines @@
       prefs::kProxyAutoDetect));
 
   if (pref_service->HasPrefPath(prefs::kProxyBypassList)) {
     std::string proxy_bypass =
         pref_service->GetString(prefs::kProxyBypassList);
     proxy_config->proxy_rules().bypass_rules.ParseFromString(proxy_bypass);
   }
 
   return proxy_config;
 }