Notify Files App when ARC++ app is installed/removed

components/arc/intent_helper/arc_intent_helper_bridge.h

Index: components/arc/intent_helper/arc_intent_helper_bridge.h
diff --git a/components/arc/intent_helper/arc_intent_helper_bridge.h b/components/arc/intent_helper/arc_intent_helper_bridge.h
index c52eb9a809c27627f34814a78ed72ebf171b0e17..cda96022e923a739d432da01890e3368e226d241 100644
--- a/components/arc/intent_helper/arc_intent_helper_bridge.h
+++ b/components/arc/intent_helper/arc_intent_helper_bridge.h
@@ -11,6 +11,7 @@
 #include "ash/link_handler_model_factory.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
 #include "components/arc/arc_service.h"
 #include "components/arc/common/intent_helper.mojom.h"
@@ -46,12 +47,21 @@ class ArcIntentHelperBridge
     FAILED_ARC_NOT_SUPPORTED,
   };
 
+  class Observer {
+   public:
+    virtual void OnAppsUpdated() = 0;

[hidehiko, 2016/11/17 07:34:19]

Document please.

[oka, 2016/11/21 07:02:15]

Done.

+  };

[Yusuke Sato, 2016/11/17 02:29:54]

Don't we need

 protected:
  virtual ~Observer() {}

?

[oka, 2016/11/21 07:02:15]

Done.

+
   ArcIntentHelperBridge(
       ArcBridgeService* bridge_service,
       const scoped_refptr<ActivityIconLoader>& icon_loader,
       const scoped_refptr<LocalActivityResolver>& activity_resolver);
   ~ArcIntentHelperBridge() override;
 
+  static ArcIntentHelperBridge* Get();

[hidehiko, 2016/11/17 07:34:19]

It's better to note this is something workaround, and encouraged to avoid as
much as possible.
Also, could you document when this returns an instance, and when not?

[oka, 2016/11/21 07:02:15]

Done.

+
+  void AddObserver(Observer* observer);
+
   // InstanceHolder<mojom::IntentHelperInstance>::Observer
   void OnInstanceReady() override;
   void OnInstanceClosed() override;
@@ -97,6 +107,8 @@ class ArcIntentHelperBridge
 
   base::ThreadChecker thread_checker_;
 
+  base::ObserverList<Observer> observer_list_;
+
   DISALLOW_COPY_AND_ASSIGN(ArcIntentHelperBridge);
 };