Remove IOThread::message_loop().

chrome/browser/io_thread.cc

 // Copyright (c) 2011 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/io_thread.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/bind.h"
@@ skipping 571 matching lines @@
 }
 
 void IOThread::ClearHostCache() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   net::HostCache* host_cache = globals_->host_resolver->GetHostCache();
   if (host_cache)
     host_cache->clear();
 }
 
-MessageLoop* IOThread::message_loop() const {
-  return BrowserThread::UnsafeGetBrowserThread(
-      BrowserThread::IO)->message_loop();
-}
-
 net::SSLConfigService* IOThread::GetSSLConfigService() {
   return ssl_config_service_manager_->Get();
 }
 
 void IOThread::InitSystemRequestContext() {
   if (system_url_request_context_getter_)
     return;
   // If we're in unit_tests, IOThread may not be run.
-  if (!message_loop())
+  if (!BrowserThread::IsMessageLoopValid(BrowserThread::IO))
     return;
   ChromeProxyConfigService* proxy_config_service =
       ProxyServiceFactory::CreateProxyConfigService();
   system_proxy_config_service_.reset(proxy_config_service);
   if (pref_proxy_config_tracker_.get()) {
     pref_proxy_config_tracker_->SetChromeProxyConfigService(
         proxy_config_service);
   }
   system_url_request_context_getter_ =
       new SystemURLRequestContextGetter(this);
   // Safe to post an unretained this pointer, since IOThread is
   // guaranteed to outlive the IO BrowserThread.
-  message_loop()->PostTask(
-      FROM_HERE, base::Bind(&IOThread::InitSystemRequestContextOnIOThread,
-                            base::Unretained(this)));
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&IOThread::InitSystemRequestContextOnIOThread,
+                 base::Unretained(this)));
 }
 
 void IOThread::InitSystemRequestContextOnIOThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(!globals_->system_proxy_service.get());
   DCHECK(system_proxy_config_service_.get());
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   globals_->system_proxy_service.reset(
       ProxyServiceFactory::CreateProxyService(
@@ skipping 17 matching lines @@
   system_params.network_delegate = globals_->system_network_delegate.get();
   system_params.net_log = net_log_;
   globals_->system_http_transaction_factory.reset(
       new net::HttpNetworkLayer(
           new net::HttpNetworkSession(system_params)));
   globals_->system_ftp_transaction_factory.reset(
       new net::FtpNetworkLayer(globals_->host_resolver.get()));
   globals_->system_request_context =
       ConstructSystemRequestContext(globals_, net_log_);
 }