Clean up file system usage of DOM exceptions

The file system code now consistently uses ExceptionState instead of
ExceptionCode and pass the customized error message as a parameter
when setting the exception.

BUG=252233

Review URL: https://chromiumcodereview.appspot.com/18258010

git-svn-id: svn://svn.chromium.org/blink/trunk@154334 bbb929c8-8fbe-4397-9dbb-9b2b20218538