arc: Notify ARC instance failures via callbacks.

components/arc/test/fake_arc_bridge_instance.h

Index: components/arc/test/fake_arc_bridge_instance.h
diff --git a/components/arc/test/fake_arc_bridge_instance.h b/components/arc/test/fake_arc_bridge_instance.h
index 5a3aa47657a6e96cc610be342e7e2cb192dc51cb..f54e3b3deeca349087dfa2c102a5adc74aed20fc 100644
--- a/components/arc/test/fake_arc_bridge_instance.h
+++ b/components/arc/test/fake_arc_bridge_instance.h
@@ -17,7 +17,7 @@ class FakeArcBridgeInstance : public mojom::ArcBridgeInstance {
   class Delegate {
    public:
     virtual ~Delegate() = default;
-    virtual void OnCrashed() = 0;
+    virtual void OnCrashed(ArcBridgeService::StopReason reason) = 0;
   };
 
   FakeArcBridgeInstance();
@@ -41,8 +41,8 @@ class FakeArcBridgeInstance : public mojom::ArcBridgeInstance {
   // The number of times Init() has been called.
   int init_calls() const { return init_calls_; }
 
-  // Simulates a crash by calling Stop() on the ArcBridgeBoostrap.
-  void SimulateCrash();
+  // Simulates a crash.
+  void SimulateCrash(ArcBridgeService::StopReason reason);

[Luis Héctor Chávez, 2016/07/11 22:28:50]

nit: I would rename this to Stop(), since it doesn't necessarily simulate a
crash. Also, the delegate method should be OnStopped.

[Shuhei Takahashi, 2016/07/12 06:13:57]

Done.

 
  private:
   Delegate* delegate_ = nullptr;