JarJar resources when building the android_webview.
The android_webview build will require there only be
a single R class (details in bug).
This change makes the necessary changes to the build
infrastructure for this to happen but the actual swap
to building the webview this way will land as a subsequent
CL.
BUG=
387155
build-only change, all trybots compile fine.
NOTRY=true
Committed:
https://src.chromium.org/viewvc/chrome?view=rev&revision=278849