PPAPI/NaCl: Restrict ppapi messages to unblock only ppapi

Currently, we don't tell the HostDispatcher to only unblock pepper messages when an incoming "unblock" pepper message comes in. This results in us unblocking non-pepper messages improperly (such as GPU messages).

BUG=116317
TEST=


Review URL: https://chromiumcodereview.appspot.com/10843017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149451 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed