[Presentation API] Adds DOMString[] constructor to PresentationRequest.

content/renderer/presentation/presentation_dispatcher.h

Index: content/renderer/presentation/presentation_dispatcher.h
diff --git a/content/renderer/presentation/presentation_dispatcher.h b/content/renderer/presentation/presentation_dispatcher.h
index e5fb81427c1bf7640cc4b2ee17927eaccd5a7c6b..74225882592eaa357a76762f488a167f79f43d58 100644
--- a/content/renderer/presentation/presentation_dispatcher.h
+++ b/content/renderer/presentation/presentation_dispatcher.h
@@ -24,6 +24,7 @@
 namespace blink {
 class WebPresentationAvailabilityObserver;
 class WebString;
+template <typename T> class WebVector;
 }  // namespace blink
 
 namespace content {
@@ -62,10 +63,10 @@ class CONTENT_EXPORT PresentationDispatcher
   // WebPresentationClient implementation.
   void setController(blink::WebPresentationController* controller) override;
   void startSession(
-      const blink::WebString& presentationUrl,
+      const blink::WebVector<blink::WebString>& presentationUrls,
       blink::WebPresentationConnectionClientCallbacks* callback) override;
   void joinSession(
-      const blink::WebString& presentationUrl,
+      const blink::WebVector<blink::WebString>& presentationUrls,
       const blink::WebString& presentationId,
       blink::WebPresentationConnectionClientCallbacks* callback) override;
   void sendString(const blink::WebString& presentationUrl,
@@ -84,11 +85,12 @@ class CONTENT_EXPORT PresentationDispatcher
   void terminateSession(const blink::WebString& presentationUrl,
                         const blink::WebString& presentationId) override;
   void getAvailability(
-      const blink::WebString& availabilityUrl,
+      const blink::WebVector<blink::WebString>& availabilityUrls,
       blink::WebPresentationAvailabilityCallbacks* callbacks) override;
   void startListening(blink::WebPresentationAvailabilityObserver*) override;
   void stopListening(blink::WebPresentationAvailabilityObserver*) override;
-  void setDefaultPresentationUrl(const blink::WebString& url) override;
+  void setDefaultPresentationUrls(
+      const blink::WebVector<blink::WebString>& urls) override;
 
   // RenderFrameObserver implementation.
   void DidCommitProvisionalLoad(