Stop using base::IDMap in the NotificationPermissionDispatcher

content/renderer/notification_permission_dispatcher.h

Index: content/renderer/notification_permission_dispatcher.h
diff --git a/content/renderer/notification_permission_dispatcher.h b/content/renderer/notification_permission_dispatcher.h
index 5c32693b18a7295e3a1fb12cbd14f7b3b9efddcd..bb3430fe1f52aa409bde5abb16bff774d0bda318 100644
--- a/content/renderer/notification_permission_dispatcher.h
+++ b/content/renderer/notification_permission_dispatcher.h
@@ -5,7 +5,7 @@
 #ifndef CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_
 #define CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_
 
-#include "base/id_map.h"
+#include "base/memory/scoped_ptr.h"
 #include "content/common/permission_service.mojom.h"
 #include "content/public/renderer/render_frame_observer.h"
 
@@ -16,6 +16,8 @@ class WebSecurityOrigin;
 
 namespace content {
 
+class RenderFrame;
+
 // Dispatcher for Web Notification permission requests.
 class NotificationPermissionDispatcher : public RenderFrameObserver {
  public:
@@ -25,18 +27,13 @@ class NotificationPermissionDispatcher : public RenderFrameObserver {
   // Requests permission to display Web Notifications for |origin|. The callback
   // will be invoked when the permission status is available. This class will
   // take ownership of |callback|.
-  void RequestPermission(
-      const blink::WebSecurityOrigin& origin,
-      blink::WebNotificationPermissionCallback* callback);
+  void RequestPermission(const blink::WebSecurityOrigin& origin,
+                         blink::WebNotificationPermissionCallback* callback);
 
  private:
   void OnPermissionRequestComplete(
-      int request_id, PermissionStatus status);
-
-  // Tracks the active notification permission requests. This class takes
-  // ownership of the created WebNotificationPermissionCallback objects.
-  IDMap<blink::WebNotificationPermissionCallback, IDMapOwnPointer>
-      pending_requests_;
+      scoped_ptr<blink::WebNotificationPermissionCallback> callback,
+      PermissionStatus status);
 
   PermissionServicePtr permission_service_;