Introduce a new API to handle native notification clicks

chrome/browser/notifications/notification_platform_bridge.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_PLATFORM_BRIDGE_H_
 #define CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_PLATFORM_BRIDGE_H_
 
 #include <set>
 #include <string>
 
 #include "base/macros.h"
+#include "chrome/browser/notifications/notification_operation_common.h"
 
 class Notification;
 
 // Provides the low-level interface that enables notifications to be displayed
 // and interacted with on the user's screen, orthogonal of whether this
 // functionality is provided by the browser or by the operating system.
 // TODO(miguelg): Add support for click and close events.
 class NotificationPlatformBridge {
  public:
   static NotificationPlatformBridge* Create();
 
   virtual ~NotificationPlatformBridge() {}
 
   // Shows a toast on screen using the data passed in |notification|.
-  virtual void Display(const std::string& notification_id,
-                       const std::string& profile_id,
-                       bool is_incognito,
-                       const Notification& notification) = 0;
+  virtual void Display(
+      notification_operation_common::NotificationHandlerType notification_type,
+      const std::string& notification_id,
+      const std::string& profile_id,
+      bool is_incognito,
+      const Notification& notification) = 0;
 
   // Closes a nofication with |notification_id| and |profile_id| if being
   // displayed.
   virtual void Close(const std::string& profile_id,
                      const std::string& notification_id) = 0;
 
   // Fills in |notifications| with a set of notification ids currently being
   // displayed for a given profile.
   // The return value expresses whether the underlying platform has the
   // capability to provide displayed notifications so the empty set
   // can be disambiguated.
   virtual bool GetDisplayed(const std::string& profile_id,
                             bool incognito,
                             std::set<std::string>* notification_ids) const = 0;
 
   // Temporary method while the refactor is finished. It denotes whether
   // the notifications will be shown by chrome itself or by the OS.
   // It is needed while migrating MacOSX and Windows to their respective
   // notification centers since the decision is made at runtime via flags.
   virtual bool SupportsNotificationCenter() const = 0;
 
  protected:
   NotificationPlatformBridge() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NotificationPlatformBridge);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_PLATFORM_BRIDGE_H_