Add a PersistentStore to FeatureEngagementTracker

components/BUILD.gn

Index: components/BUILD.gn
diff --git a/components/BUILD.gn b/components/BUILD.gn
index 5426057cc9fe13555e0a4be88256bd729716ea6a..e602dcb893f6b33a69a3f11bfd22831c1c7ad1b3 100644
--- a/components/BUILD.gn
+++ b/components/BUILD.gn
@@ -242,6 +242,8 @@ test("components_unittests") {
     data_deps += [ "//content/shell:pak" ]
   }
 
+  deps += [ "//components/feature_engagement_tracker:unit_tests" ]

[nyquist, 2017/05/11 17:08:03]

Hey, this looks just like the local edit I always do when I work in this
component! :-p
I think you might not want to commit it though :-p

[David Trainor- moved to gerrit, 2017/05/11 19:30:28]

O_o

+
   if (is_android) {
     deps += [
       "//components/cdm/browser:unit_tests",