[8] Review request for 7199180: [macosx] Dead keys handling for input methods

[Alexander Scherbatiy]

bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7199180
webrev: http://cr.openjdk.java.net/~alexsch/7199180/webrev.00/

Key events which have marked text are processed by the 
interpretKeyEvents method and so they are filtered for the 
deliverJavaKeyEventHelper method.
However we need to process dead key events which also set marked text 
flag to generate dead key pressed event.

Thanks,
Alexandr.