vcldemo: add some clipping tests under the checkerboard tile.
vcldemo: add some clipping tests under the checkerboard tile.

Change-Id: I801931055aeba38e9173fb04dcc44b220cd3f17e

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core