Implements shadow method to record Canvas#drawCircle(...) events.
Adds final qualifier for shadow canvas history events.
Merge pull request #736 from aweber/shadow-canvas-draw-circle

Implements shadow method to record Canvas#drawCircle(...) events.
Fix qualifier order per JLS for ShadowCanvas inner class members.
Merge pull request #739 from aweber/shadow-canvas-draw-circle

Fix qualifier order per JLS for ShadowCanvas inner class members.