WidgetWin::SetBound on a maximized window leaves the window in the 'maximized' state.

Now when SetBounds is called, we detect the maximized state and take the window
out of this state.

BUG=69618
TEST=WidgetWinTest.SetBoundsForZoomedWindow (added)

Review URL: http://codereview.chromium.org/6268002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71499 0039d316-1c4b-4281-b951-d872f2087c98