<AWT Dev> Review Request for 8056911: Remove internal API usage from ExtendedRobot class

[Dmitriy Ermashov]

Hi awt team,

Please review a fix for 8056911, remove internal API usage from 
ExtendedRobot class.
We have to throw out all calls of sun.* packages from tests because of 
incompatibility with Jigsaw project.

http://cr.openjdk.java.net/~dermashov/8056911/webrev.00/

The CCC request will take place after the review process will be completed.

Thanks,
Dima