Bug 854082 - Attribute bug 621618 assertions to the proper test. r=gfritzsche
Bug 854082 - Test. r=bsmedberg
Bug 854082 - Restore SetFrame(null) call to avoid instance owners pointing to dead frames. r=bsmedberg
Bug 854082 - Cleanup plugin frame ownership, prevent losing our frame due to re-entrance. r=bsmedberg
Bug 863792 - Handle re-entry during plugin instantiation. r=josh
Bug 863792 - Test. r=josh