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

third_party/WebKit/Source/modules/presentation/Presentation.cpp

 // Copyright 2014 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.
 
 #include "modules/presentation/Presentation.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "modules/presentation/PresentationController.h"
 #include "modules/presentation/PresentationReceiver.h"
 #include "modules/presentation/PresentationRequest.h"
+#include "platform/weborigin/KURL.h"
+#include "wtf/Vector.h"
 
 namespace blink {
 
 Presentation::Presentation(LocalFrame* frame) : DOMWindowProperty(frame) {}
 
 // static
 Presentation* Presentation::create(LocalFrame* frame) {
   ASSERT(frame);
 
   Presentation* presentation = new Presentation(frame);
   PresentationController* controller = PresentationController::from(*frame);
   ASSERT(controller);
   controller->setPresentation(presentation);
   return presentation;
 }
 
 DEFINE_TRACE(Presentation) {
   visitor->trace(m_defaultRequest);
   visitor->trace(m_receiver);
   DOMWindowProperty::trace(visitor);
 }
 
 PresentationRequest* Presentation::defaultRequest() const {
   return m_defaultRequest;
 }
 
 void Presentation::setDefaultRequest(PresentationRequest* request) {
+  if (!request)
+    return;

[mlamouri (slow - plz ping), 2016/12/10 12:06:18]

Wouldn't this prevent `navigator.presentation.defaultRequest = null;` to work?

[zhaobin, 2016/12/12 19:53:45]

Done.

[zhaobin, 2016/12/12 19:53:45]

yes, it will break defaultRequest = null. Reverted it back.

+
   m_defaultRequest = request;
 
   if (!frame())
     return;
 
   PresentationController* controller = PresentationController::from(*frame());
   if (!controller)
     return;
-  controller->setDefaultRequestUrl(request ? request->url() : KURL());
+  controller->setDefaultRequestUrl(request->urls());
 }
 
 PresentationReceiver* Presentation::receiver() {
   if (!frame() || !frame()->settings())
     return nullptr;
 
   if (!frame()->settings()->presentationReceiver())
     return nullptr;
 
   if (!m_receiver) {
     PresentationController* controller = PresentationController::from(*frame());
     auto* client = controller ? controller->client() : nullptr;
     m_receiver = new PresentationReceiver(frame(), client);
   }
 
   return m_receiver;
 }
 
 }  // namespace blink