[WebView] Fix build breakage after cherry-pick from lmp-mr1-dev.

The cherry-pick from lmp-mr1-dev removed the dependency on
ActivityThread, but a new dependency in master-chromium has been
introduced since mr1.

Change-Id: I1c1c3358a3b85387e329dce4c41845d95601ea7e
1 file changed
tree: ba1fafc07bfc37a97755434e1d29b52fc0425dac
  1. chromium/
  2. Android.mk