Themes: Fix some of the documentation for BrowserThemePack.
Themes: Fix some of the documentation for BrowserThemePack.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/604039

git-svn-id: http://src.chromium.org/svn/trunk/src@38979 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 15f98ca8523d467aaa3efb3d86c5f6f50a2a6271
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