Remove BrowserThread::UnsafeGetBrowserThread, add UnsafeGetMessageLoopForThread.

content/shell/shell_browser_context.cc

Index: content/shell/shell_browser_context.cc
diff --git a/content/shell/shell_browser_context.cc b/content/shell/shell_browser_context.cc
index b72beaf4e0e55e0ac79cace8c88c2207df2bd080..f5c699611eea933f1e3338bb5d1b2fa4f5d41089 100644
--- a/content/shell/shell_browser_context.cc
+++ b/content/shell/shell_browser_context.cc
@@ -142,10 +142,8 @@ net::URLRequestContextGetter* ShellBrowserContext::GetRequestContext()  {
   if (!url_request_getter_) {
     url_request_getter_ = new ShellURLRequestContextGetter(
         GetPath(),
-        BrowserThread::UnsafeGetBrowserThread(
-            BrowserThread::IO)->message_loop(),
-        BrowserThread::UnsafeGetBrowserThread(
-            BrowserThread::FILE)->message_loop());
+        BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::IO),
+        BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::FILE));
   }
   return url_request_getter_;
 }