MediaPerceptionPrivate API impl and testing.

chromeos/dbus/fake_upstart_client.h

Index: chromeos/dbus/fake_upstart_client.h
diff --git a/chromeos/dbus/fake_upstart_client.h b/chromeos/dbus/fake_upstart_client.h
index efcb5e6a6c1344b3e19a417dd0bd3e667b7c182e..6e5de7b8366b95c439a12d5a7e913f4463ffe725 100644
--- a/chromeos/dbus/fake_upstart_client.h
+++ b/chromeos/dbus/fake_upstart_client.h
@@ -25,7 +25,13 @@ class CHROMEOS_EXPORT FakeUpstartClient : public UpstartClient {
   void StartMediaAnalytics(const UpstartCallback& callback) override;
   void StopMediaAnalytics() override;
 
+  void SetStartMediaAnalyticsWillSucceed(bool will_succeed);
+
  private:
+  // Sets whether the StartMediaAnalytics method will succeed. Used for testing
+  // upstart failure case.

[tbarzic, 2017/05/16 20:56:30]

no need for the "Used for testing" comment.

[Luke Sorenson, 2017/05/16 21:33:33]

Done.

+  bool start_media_analytics_will_succeed_;
+
   DISALLOW_COPY_AND_ASSIGN(FakeUpstartClient);
 };