[Presentation API] Add support to content/ for multiple URLs per PresentationRequest.

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"
 
 #include <memory>
 
 namespace blink {
 
 class WebPresentationAvailabilityObserver;
 class WebPresentationController;
 class WebPresentationConnectionClient;
 class WebString;
 struct WebPresentationError;
+template <typename T>
+class WebVector;
 
 // If session was created, callback's onSuccess() is invoked with the information about the
 // presentation session created by the embedder. Otherwise, onError() is invoked with the error code
 // and message.
 using WebPresentationConnectionClientCallbacks = WebCallbacks<std::unique_ptr<WebPresentationConnectionClient>, const WebPresentationError&>;
 
 // Callback for .getAvailability().
 using WebPresentationAvailabilityCallbacks = WebCallbacks<bool, const WebPresentationError&>;
 
 // The implementation the embedder has to provide for the Presentation API to work.
+// TODO(crbug.com/632623): Use WebURL instead of WebString in this API.
 class WebPresentationClient {
 public:
     virtual ~WebPresentationClient() { }
 
     // Passes the Blink-side delegate to the embedder.
     virtual void setController(WebPresentationController*) = 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 WebString& presentationUrl, WebPresentationConnectionClientCallbacks*) = 0;
+    virtual void startSession(const WebVector<WebString>& presentationUrls, 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 WebString& presentationUrl, const WebString& presentationId, WebPresentationConnectionClientCallbacks*) = 0;
+    virtual void joinSession(const WebVector<WebString>& presentationUrls, const WebString& presentationId, WebPresentationConnectionClientCallbacks*) = 0;
 
     // Called when the frame requests to send String message to an existing session.
+
     virtual void sendString(const WebString& 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 WebString& presentationUrl, const WebString& presentationId, const uint8_t* data, size_t length) = 0;
 
     // Called when the frame requests to send Blob data to an existing session.
     // Embedder copies the |data| and the ownership is not transferred.
     virtual void sendBlobData(const WebString& presentationUrl, const WebString& presentationId, const uint8_t* data, size_t length) = 0;
 
@@ skipping 12 matching lines @@
     // 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 setDefaultPresentationUrl(const WebString&) = 0;
+    virtual void setDefaultPresentationUrls(const WebVector<WebString>&) = 0;
 };
 
 } // namespace blink
 
 #endif // WebPresentationClient_h