Fix TestViewWidthAfterMinimizingWidget

This depends on the client area being 0 in this case, so avoid using GetBounds.

BUG=286609

Review URL: https://codereview.chromium.org/70103026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235514 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235514