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

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

Index: third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
diff --git a/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h b/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
index b0bae336331a1a5cf3e5c9fa44bb850d08ba1419..7bef4b373bcebf04ad6e85b20e0cfa33fbc2c77c 100644
--- a/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
+++ b/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
@@ -17,6 +17,8 @@ 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
@@ -36,11 +38,11 @@ public:
 
     // 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;
@@ -75,7 +77,7 @@ public:
 
     // 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