Limit constrained windows to the size of the parent view.

Limit constrained windows to the size of the parent view.

Constrained windows would get drawn partially outside the browser
window, obscuring some of the contents. This CL limits their size so
everything is in view. This mimics the behavior of the old style
dialogs.

This CL also changes the size request to use the current preferred size
of the view, instead of reusing the existing size. Some dialogs (like
the print preview) changes their size preferences when the browser
window size changes, so the old size might not be optimal any more.

Additionally, added a GetMinimumSize to the bubble frame view, as
previously GetPreferredSize would get used, effectively undoing the
additional restrictions placed based on Window sizes.

BUG=272760,274236,276150

Review URL: https://chromiumcodereview.appspot.com/22903022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221573 0039d316-1c4b-4281-b951-d872f2087c98