Resize surface on receipt of WM_SIZE to avoid corruption during resize. We hook WM_SIZE using window subclassing.

This is a continuation of http://codereview.appspot.com/3038042/


Review URL: http://codereview.appspot.com/3122041

git-svn-id: https://angleproject.googlecode.com/svn/trunk@486 736b8ea6-26fd-11df-bfd4-992fa37f6226