Invalidate the whole screen when the frame size is changed.
Otherwise we'll compare frames of different sizes and read into invalid
memory.

BUG=https://code.google.com/p/chromium/issues/detail?id=345498
R=sergeyu@chromium.org

Review URL: https://webrtc-codereview.appspot.com/9149004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5614 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed