Remove all remaining traces of MessageLoopProxy.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 54df3f5641ce39e4442445d9eab7d90651824854..14b9b22a0caad2f3c9c629508d939b6dcc91bc5e 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -797,7 +797,7 @@ void ChromeBrowserMainParts::StartMetricsRecording() {
   TRACE_EVENT0("startup", "ChromeBrowserMainParts::StartMetricsRecording");
 
   g_browser_process->metrics_service()->CheckForClonedInstall(
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE));
 
   g_browser_process->GetMetricsServicesManager()->UpdateUploadPermissions(true);
 }
@@ -1452,7 +1452,7 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   }
 
   ui::SelectFileDialog::SetFactory(new ChromeSelectFileDialogFactory(
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)));
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO)));
 #endif  // defined(OS_WIN)
 
   if (parsed_command_line().HasSwitch(switches::kMakeDefaultBrowser)) {