Cleaned up Media filter interface comments and definitions.
Cleaned up Media filter interface comments and definitions.

The changes are based on Darin's comments on the Media buffer interface definitions (i.e., comments, virtual destructors).

Also, I figured you might be interested :)

Review URL: http://codereview.chromium.org/13261

git-svn-id: http://src.chromium.org/svn/trunk/src@6553 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 2b2bcafc04d34290a12ea5877b3f0eb6cc3fb7e6
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