Add sync context dispatch restriction.
This adds a way to restrict on a per-channel basis that incoming messages may only be dispatched when that particular channel is sending a sync message (or in a message loop).
It does so to the PPAPI channels, which may not introduce a sync dependency circle.
BUG=chromiumos:13821
TEST=news.google.com with Pepper Flash (see bug)
Review URL: http://codereview.chromium.org/6810013
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@80892 0039d316-1c4b-4281-b951-d872f2087c98
CrOS-Libchrome-Original-Commit: 54af05f8ea8050e0ab93dbcc940ac4e1bc4068e5
4 files changed