Fix manipulationTestHelper skip warning.
Merge branch 'skipFunc' into geckoFocusResetDesignmodeBug
Fix syntax error.
Merge branch 'skipFunc' into geckoFocusResetDesignmodeBug
Handle zero expectation in manipulationTestHelper skipping
Merge branch 'skipFunc' into geckoFocusResetDesignmodeBug
Core test: Focusing on document triggers designMode if it is off
Slightly improve _isDesignModeOn
Add _enableDesignModeOnDocument.
Use _enableDesignModeOnDocument on init.
Move Gecko's design mode quirks to its _designModeQuirks()
Check for designMode status on focus and re-enable if required.