Don't use base::MessageLoop::{Quit,QuitClosure} in chrome/

This patch renames base::MessageLoop::{Quit,QuitClosure} to
base::MessageLoop::{QuitWhenIdle,QuitWhenIdleClosure}.

BUG=131220
TEST=
[email protected]

Review URL: https://codereview.chromium.org/1395103003

Cr-Commit-Position: refs/heads/master@{#353376}
diff --git a/chrome/browser/browser_keyevents_browsertest.cc b/chrome/browser/browser_keyevents_browsertest.cc
index d7fc76fd..31718d2 100644
--- a/chrome/browser/browser_keyevents_browsertest.cc
+++ b/chrome/browser/browser_keyevents_browsertest.cc
@@ -117,7 +117,7 @@
     if (*dom_op_result.ptr() == "\"FINISHED\"") {
       finished_ = true;
       if (waiting_)
-        base::MessageLoopForUI::current()->Quit();
+        base::MessageLoopForUI::current()->QuitWhenIdle();
     }
   }