Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h

Index: third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
diff --git a/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h b/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
index 20aa454aff0e34d66ad5479f64c958254ea1eb6a..750dba2f6062f53d6231b0d16c11ece30cd8aaa1 100644
--- a/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
+++ b/third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h
@@ -55,9 +55,10 @@ class WebNotificationManager {
   // Worker Registration.  If |filterTag| is not an empty string, only the
   // notification with the given tag will be considered. Will take ownership of
   // the WebNotificationGetCallbacks object.
-  virtual void getNotifications(const WebString& filterTag,
-                                WebServiceWorkerRegistration*,
-                                WebNotificationGetCallbacks*) = 0;
+  virtual void getNotifications(
+      const WebString& filterTag,
+      WebServiceWorkerRegistration*,
+      std::unique_ptr<WebNotificationGetCallbacks>) = 0;
 
   // Closes a notification previously shown, and removes it if being shown.
   virtual void close(WebNotificationDelegate*) = 0;