Use internal chrome source tree for telemetry.

Now sync_chrome works for mobiletc-prebuild, there is no need to
have this workaround.

BUG=none
TEST=ebuild-caroline $(equery-caroline w chromeos-chrome) prepare
     works on mobiletc-prebuild account

Change-Id: I36ca9967b8b8fe5f79ca3b4dedc69271484d633f
Reviewed-on: https://chromium-review.googlesource.com/1089114
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
1 file changed