Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

content/renderer/push_messaging/push_messaging_dispatcher.cc

Index: content/renderer/push_messaging/push_messaging_dispatcher.cc
diff --git a/content/renderer/push_messaging/push_messaging_dispatcher.cc b/content/renderer/push_messaging/push_messaging_dispatcher.cc
index c1b6b381e2f447721c3f1a859277bc550dbe9e1e..cbb7d2308878f37a27fe5d6ae35241a7cc180de6 100644
--- a/content/renderer/push_messaging/push_messaging_dispatcher.cc
+++ b/content/renderer/push_messaging/push_messaging_dispatcher.cc
@@ -4,6 +4,8 @@
 
 #include "content/renderer/push_messaging/push_messaging_dispatcher.h"
 
+#include <memory>
+
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/child/push_messaging/push_provider.h"
@@ -78,7 +80,8 @@ void PushMessagingDispatcher::DidGetManifest(
   // Get the sender_info from the manifest since it wasn't provided by
   // the caller.
   if (manifest.IsEmpty()) {
-    int request_id = subscription_callbacks_.Add(callbacks);
+    int request_id = subscription_callbacks_.Add(
+        std::unique_ptr<blink::WebPushSubscriptionCallbacks>(callbacks));
     OnSubscribeFromDocumentError(
         request_id, PUSH_REGISTRATION_STATUS_MANIFEST_EMPTY_OR_MISSING);
     return;
@@ -98,7 +101,8 @@ void PushMessagingDispatcher::DoSubscribe(
     blink::WebServiceWorkerRegistration* service_worker_registration,
     const PushSubscriptionOptions& options,
     blink::WebPushSubscriptionCallbacks* callbacks) {
-  int request_id = subscription_callbacks_.Add(callbacks);
+  int request_id = subscription_callbacks_.Add(
+      std::unique_ptr<blink::WebPushSubscriptionCallbacks>(callbacks));
   int64_t service_worker_registration_id =
       static_cast<WebServiceWorkerRegistrationImpl*>(
           service_worker_registration)