Bug 538532: When a plugin crashes, make sure all its instances are "stopped" ASAP. r=bsmedberg r=josh

--HG--
extra : rebase_source : 4355e574e5cf74da76ef5773e16fa3bd9a09225e

modules/plugin/base/src/nsPluginHost.cpp

@@ -5189,6 +5189,7 @@ nsPluginHost::PluginCrashed(nsNPAPIPlugin* aPlugin)
         objectContent->PluginCrashed();
       }
 
+      instancetag->mInstance->Stop();
       *pinstancetag = (*pinstancetag)->mNext;
       delete instancetag;
     }