Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h

 // Copyright 2015 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 WebPresentationClient_h
 #define WebPresentationClient_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 
@@ skipping 28 matching lines @@
  public:
   virtual ~WebPresentationClient() {}
 
   // Passes the Blink-side delegate to the embedder.
   virtual void setController(WebPresentationController*) = 0;
 
   // Passes the Blink-side delegate to the embedder.
   virtual void setReceiver(WebPresentationReceiver*) = 0;
 
   // Called when the frame requests to start a new session.
-  // The ownership of the |callbacks| argument is transferred to the embedder.
-  virtual void startSession(const WebVector<WebURL>& presentationUrls,
-                            WebPresentationConnectionClientCallbacks*) = 0;
+  virtual void startSession(
+      const WebVector<WebURL>& presentationUrls,
+      std::unique_ptr<WebPresentationConnectionClientCallbacks>) = 0;
 
   // Called when the frame requests to join an existing session.
-  // The ownership of the |callbacks| argument is transferred to the embedder.
-  virtual void joinSession(const WebVector<WebURL>& presentationUrls,
-                           const WebString& presentationId,
-                           WebPresentationConnectionClientCallbacks*) = 0;
+  virtual void joinSession(
+      const WebVector<WebURL>& presentationUrls,
+      const WebString& presentationId,
+      std::unique_ptr<WebPresentationConnectionClientCallbacks>) = 0;
 
   // Called when the frame requests to send String message to an existing
   // session.
   virtual void sendString(const WebURL& presentationUrl,
                           const WebString& presentationId,
                           const WebString& message) = 0;
 
   // Called when the frame requests to send ArrayBuffer/View data to an existing
   // session.  Embedder copies the |data| and the ownership is not transferred.
   virtual void sendArrayBuffer(const WebURL& presentationUrl,
@@ skipping 10 matching lines @@
 
   // Called when the frame requests to close an existing session.
   virtual void closeSession(const WebURL& presentationUrl,
                             const WebString& presentationId) = 0;
 
   // Called when the frame requests to terminate an existing session.
   virtual void terminateSession(const WebURL& presentationUrl,
                                 const WebString& presentationId) = 0;
 
   // Called when the frame wants to know the availability of a presentation
-  // display for |availabilityUrl|.  The ownership of the callbacks argument
-  // is transferred to the embedder.
-  virtual void getAvailability(const WebURL& availabilityUrl,
-                               WebPresentationAvailabilityCallbacks*) = 0;
+  // display for |availabilityUrl|.
+  virtual void getAvailability(
+      const WebURL& availabilityUrl,
+      std::unique_ptr<WebPresentationAvailabilityCallbacks>) = 0;
 
   // Start listening to changes in presentation displays availability. The
   // observer will be notified in case of a change. The observer is
   // respensible to call stopListening() before being destroyed.
   virtual void startListening(WebPresentationAvailabilityObserver*) = 0;
 
   // Stop listening to changes in presentation displays availability. The
   // observer will no longer be notified in case of a change.
   virtual void stopListening(WebPresentationAvailabilityObserver*) = 0;
 
   // Called when a defaultRequest has been set. It sends the url associated
   // with it for the embedder.
   virtual void setDefaultPresentationUrls(const WebVector<WebURL>&) = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebPresentationClient_h