Convert uses of int ms to TimeDelta in ppapi.

R=brettw@chromium.org
BUG=108171


Review URL: http://codereview.chromium.org/9583035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124876 0039d316-1c4b-4281-b951-d872f2087c98

ppapi/proxy/ppb_core_proxy.cc

@@ -64,7 +64,7 @@ void CallOnMainThread(int delay_in_ms,
   GetMainThreadMessageLoop()->PostDelayedTask(
       FROM_HERE,
       RunWhileLocked(base::Bind(&CallbackWrapper, callback, result)),
-      delay_in_ms);
+      base::TimeDelta::FromMilliseconds(delay_in_ms));
 }
 
 PP_Bool IsMainThread() {