GitLab

 This was asssuming that the visibile area has 0,0 origin.

Move the code to ensure minimum visibility when added, from
WorkspaceLayoutManager to DragWindowResizer.

BUG=none
TEST=WindowUtilTest.AdjustBoundsToEnsureWindowVisibility.
 This also fixes the test that was failing.
TBR=oshima@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=243986

Review URL: https://codereview.chromium.org/106303005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244131 0039d316-1c4b-4281-b951-d872f2087c98