Fix a BAD_OVERRIDE defect reported by Coverity.  Change the prototype of the GetDefaultThemeProvider method in the base class to match the prototypes of the GetDefaultThemeProvider methods in the subclasses BrowserFrameWin and BrowserFrameGtk.
Fix a BAD_OVERRIDE defect reported by Coverity.  Change the
prototype of the GetDefaultThemeProvider method in the base
class to match the prototypes of the GetDefaultThemeProvider
methods in the subclasses BrowserFrameWin and BrowserFrameGtk.

R=glen
BUG=17104
TEST=none
Review URL: http://codereview.chromium.org/159479

git-svn-id: http://src.chromium.org/svn/trunk/src@22568 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 9caf4f76a36d0836c5493722cc393f9f40e1c944
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser