[webkit-reviews] review requested: [Bug 33509] selection.modify() should throw an exception if it receives invalid parameters : [Attachment 50471] patch v0

[bugzilla-daemon at webkit.org]

MORITA Hajime <morrita at google.com> has asked  for review:
Bug 33509: selection.modify() should throw an exception if it receives invalid
parameters
https://bugs.webkit.org/show_bug.cgi?id=33509

Attachment 50471: patch v0
https://bugs.webkit.org/attachment.cgi?id=50471&action=review