Add IPC messages for ARC notification

components/arc/arc_bridge_service.h

Index: components/arc/arc_bridge_service.h
diff --git a/components/arc/arc_bridge_service.h b/components/arc/arc_bridge_service.h
index e3417bc985756c0db52044b339df84c9da3d350b..2f962f06f92cf1bb6a4cc3bbf697abbda7ffb516 100644
--- a/components/arc/arc_bridge_service.h
+++ b/components/arc/arc_bridge_service.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/sequenced_task_runner.h"
+#include "components/arc/common/arc_notification_types.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_message.h"
@@ -67,6 +68,13 @@ class ArcBridgeService : public IPC::Listener {
     // Called whenever ARC's availability has changed for this system.
     virtual void OnAvailableChanged(bool available) {}
 
+    // Called whenever a notification has been posted on Android side. This
+    // event is used for both creation and update.
+    virtual void OnNotificationPostedFromAndroid(
+        const ArcNotificationData& data) {}
+    // Called whenever a notification has been removed on Android side.
+    virtual void OnNotificationRemovedFromAndroid(const std::string& key) {}
+
    protected:
     virtual ~Observer() {}
   };
@@ -115,6 +123,9 @@ class ArcBridgeService : public IPC::Listener {
                            const std::string& device_type,
                            base::ScopedFD fd);
 
+  // Notifys a notification event to Android side.
+  bool NotifyNotificationEvent(const std::string& key, NotificationEvent event);
+
  private:
   friend class ArcBridgeTest;
   FRIEND_TEST_ALL_PREFIXES(ArcBridgeTest, Basic);
@@ -148,6 +159,11 @@ class ArcBridgeService : public IPC::Listener {
   // interaction.
   void OnInstanceReady();
 
+  // Handler for ArcInstanceHostMsg_NotificationPosted message.
+  void OnNotificationPosted(const ArcNotificationData& data);
+  // Handler for ArcInstanceHostMsg_NotificationRemoved message.
+  void OnNotificationRemoved(const std::string& key);
+
   // Changes the current state and notifies all observers.
   void SetState(State state);