Custom title bar without padding (Android)

Question

So I am using the techniques in this thread to use a custom background for my titlebar. Unfortunately the framework places my layout inside a FrameLayout (title_container) which has padding as seen below.

_{(source: ggpht.com)}

Is there anyway to remove the grey borders? The frame layout is defined in com.android.internal.R.id.title_container, so accessing the frame by ID would be fragile.