Remove all remaining traces of MessageLoopProxy.

chrome/browser/chrome_browser_main_win.cc

Index: chrome/browser/chrome_browser_main_win.cc
diff --git a/chrome/browser/chrome_browser_main_win.cc b/chrome/browser/chrome_browser_main_win.cc
index 4ce60eba8c586babd81549f63c81b5d6241fdcbd..fc8dfe7b7b6e7f86c2fcebb303ba005bbfe1ce14 100644
--- a/chrome/browser/chrome_browser_main_win.cc
+++ b/chrome/browser/chrome_browser_main_win.cc
@@ -318,7 +318,7 @@ void ChromeBrowserMainPartsWin::PostProfileInit() {
   base::FilePath path(
       profile()->GetPath().AppendASCII("ChromeDWriteFontCache"));
   content::BrowserThread::PostAfterStartupTask(
-      FROM_HERE, content::BrowserThread::GetMessageLoopProxyForThread(
+      FROM_HERE, content::BrowserThread::GetTaskRunnerForThread(
                      content::BrowserThread::FILE),
       base::Bind(base::IgnoreResult(&base::DeleteFile), path, false));
 }