Introduce a new API to handle native notification clicks

chrome/browser/notifications/native_notification_display_service.h

Index: chrome/browser/notifications/native_notification_display_service.h
diff --git a/chrome/browser/notifications/native_notification_display_service.h b/chrome/browser/notifications/native_notification_display_service.h
index 37989383a1d846ec7f50254d7cc3ece8e25acc9b..0b083dcdbf57c288c2c31cd6e2dc7cece6670700 100644
--- a/chrome/browser/notifications/native_notification_display_service.h
+++ b/chrome/browser/notifications/native_notification_display_service.h
@@ -5,12 +5,17 @@
 #ifndef CHROME_BROWSER_NOTIFICATIONS_NATIVE_NOTIFICATION_DISPLAY_SERVICE_H_
 #define CHROME_BROWSER_NOTIFICATIONS_NATIVE_NOTIFICATION_DISPLAY_SERVICE_H_
 
+#include <map>
+#include <memory>
 #include <set>
 #include <string>
+
 #include "base/macros.h"
 #include "chrome/browser/notifications/notification_display_service.h"
+#include "chrome/browser/notifications/notification_operation_common.h"
 
 class Notification;
+class NotificationHandler;
 class NotificationPlatformBridge;
 class Profile;
 
@@ -24,15 +29,39 @@ class NativeNotificationDisplayService : public NotificationDisplayService {
   ~NativeNotificationDisplayService() override;
 
   // NotificationDisplayService implementation.
-  void Display(const std::string& notification_id,
-               const Notification& notification) override;
-  void Close(const std::string& notification_id) override;
+  void Display(
+      notification_operation_common::NotificationHandlerType notification_type,
+      const std::string& notification_id,
+      const Notification& notification) override;
+  void Close(
+      notification_operation_common::NotificationHandlerType notification_type,
+      const std::string& notification_id) override;
   bool GetDisplayed(std::set<std::string>* notifications) const override;
+
+  void ProcessNotificationOperation(
+      notification_operation_common::NotificationOperation operation,
+      notification_operation_common::NotificationHandlerType notification_type,
+      const std::string& origin,
+      const std::string& notification_id,
+      int action_index) override;
+
+  void AddNotificationHandler(
+      notification_operation_common::NotificationHandlerType notification_type,
+      std::unique_ptr<NotificationHandler> handler);
+  void RemoveNotificationHandler(
+      notification_operation_common::NotificationHandlerType notification_type);
+
   bool SupportsNotificationCenter() const override;
 
  private:
+  NotificationHandler* GetNotificationHandler(
+      notification_operation_common::NotificationHandlerType notification_type);
+
   Profile* profile_;
   NotificationPlatformBridge* notification_bridge_;
+  std::map<notification_operation_common::NotificationHandlerType,
+           std::unique_ptr<NotificationHandler>>
+      notification_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeNotificationDisplayService);
 };