Revert "Revert "Const-ify RefCountedThreadSafe::AddRef and Release.""

chrome/browser/sync/glue/http_bridge.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/sync/glue/http_bridge.h"
 
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/string_number_conversions.h"
 #include "chrome/browser/browser_thread.h"
@@ skipping 26 matching lines @@
   }
 
   // Apply the user agent which was set earlier.
   if (is_user_agent_set())
     context_->set_user_agent(user_agent_);
 
   return context_;
 }
 
 scoped_refptr<base::MessageLoopProxy>
-HttpBridge::RequestContextGetter::GetIOMessageLoopProxy() {
+HttpBridge::RequestContextGetter::GetIOMessageLoopProxy() const {
   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
 }
 
 HttpBridgeFactory::HttpBridgeFactory(
     URLRequestContextGetter* baseline_context_getter) {
   DCHECK(baseline_context_getter != NULL);
   request_context_getter_ =
       new HttpBridge::RequestContextGetter(baseline_context_getter);
 }
 
@@ skipping 181 matching lines @@
   // URLFetcher, so it seems most natural / "polite" to let the stack unwind.
   MessageLoop::current()->DeleteSoon(FROM_HERE, url_poster_);
   url_poster_ = NULL;
 
   // Wake the blocked syncer thread in MakeSynchronousPost.
   // WARNING: DONT DO ANYTHING AFTER THIS CALL! |this| may be deleted!
   http_post_completed_.Signal();
 }
 
 }  // namespace browser_sync