[ChromeDriver] Update Windows set size Selenium Java tests

In CL https://crrev.com/629491 WebUI content windows minimum
size is set to (500,1), and for Mac it is required the height to be
3/4 of the width, so we have increased windows heights by 75 points
in our WindowTest.testCanMaximize* tests.

Change-Id: I3d7bdf4ef92014af75b690267c4eb40587148a96
2 files changed