Prase IDL files in common/extensions/api PRESUBMIT check.

Review URL: https://chromiumcodereview.appspot.com/23512007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224709 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224709