Update Views bubble frames on Windows theme changes.

Update content on Windows theme changes (Glass->Classic).
Implement BubbleFrameView::OnThemeChanged to fix title/close.
Called via NonClientView::UpdateFrame after being clobbered.

BUG=308262
TEST=Dialogs retain their title and close button after windows theme changes.
R=sky@chromium.org

Review URL: https://codereview.chromium.org/58863002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233150 0039d316-1c4b-4281-b951-d872f2087c98
These docs refer to commands that are really out of date, and most likely don't even work anymore. Updating them to be more current.

BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/59043008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233151 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233150
SVN changes up to revision 233151