Flip: Fix cancellation code path. The current fix is suboptimal, since we're doing unnecessary work in the FlipStream (still handling reads and writes for a cancelled stream), but just don't ever hand the data over to a user since they've already cancelled the stream.  We should fix this, but don't bother for now.  Not calling any user_callback_ is good enough for now.
Flip: Fix cancellation code path.
The current fix is suboptimal, since we're doing unnecessary work in the FlipStream (still handling reads and writes for a cancelled stream), but just don't ever hand the data over to a user since they've already cancelled the stream.  We should fix this, but don't bother for now.  Not calling any user_callback_ is good enough for now.

Review URL: http://codereview.chromium.org/439002

git-svn-id: http://src.chromium.org/svn/trunk/src@32881 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: b63eede45a0d3e55a50332244a33735d6b6cc3a5
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser