Remove all remaining traces of MessageLoopProxy.

chrome/browser/extensions/api/page_capture/page_capture_api.cc

Index: chrome/browser/extensions/api/page_capture/page_capture_api.cc
diff --git a/chrome/browser/extensions/api/page_capture/page_capture_api.cc b/chrome/browser/extensions/api/page_capture/page_capture_api.cc
index e1c962ceda3fbed6f6d34dd8a96ae9b9edfc51c1..1e7c549d533f94e0f6f1c53a883d9c5680c85049 100644
--- a/chrome/browser/extensions/api/page_capture/page_capture_api.cc
+++ b/chrome/browser/extensions/api/page_capture/page_capture_api.cc
@@ -106,10 +106,8 @@ void PageCaptureSaveAsMHTMLFunction::TemporaryFileCreated(bool success) {
       // Setup a ShareableFileReference so the temporary file gets deleted
       // once it is no longer used.
       mhtml_file_ = ShareableFileReference::GetOrCreate(
-          mhtml_path_,
-          ShareableFileReference::DELETE_ON_FINAL_RELEASE,
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)
-              .get());
+          mhtml_path_, ShareableFileReference::DELETE_ON_FINAL_RELEASE,
+          BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE).get());
     }
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,