Adds HTTP check to PresentationRequest creation.

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

 // 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.
 
 #include "modules/presentation/PresentationRequest.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 66 matching lines @@
   if (urls.isEmpty()) {
     exceptionState.throwDOMException(NotSupportedError,
                                      "Do not support empty sequence of URLs.");
     return nullptr;
   }
 
   Vector<KURL> parsedUrls(urls.size());
   for (size_t i = 0; i < urls.size(); ++i) {
     const KURL& parsedUrl = KURL(executionContext->url(), urls[i]);
 
-    if (!parsedUrl.isValid() || parsedUrl.protocolIsAbout()) {
+    if (!parsedUrl.isValid() ||
+        !(parsedUrl.protocolIsInHTTPFamily() || parsedUrl.protocolIs("cast"))) {
       exceptionState.throwDOMException(
           SyntaxError, "'" + urls[i] + "' can't be resolved to a valid URL.");
       return nullptr;
     }
 
     if (MixedContentChecker::isMixedContent(
             executionContext->getSecurityOrigin(), parsedUrl)) {
       exceptionState.throwDOMException(
           SecurityError, "Presentation of an insecure document [" + urls[i] +
                              "] is prohibited from a secure context.");
@@ skipping 123 matching lines @@
   visitor->trace(m_availabilityProperty);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 PresentationRequest::PresentationRequest(ExecutionContext* executionContext,
                                          const Vector<KURL>& urls)
     : ContextLifecycleObserver(executionContext), m_urls(urls) {}
 
 }  // namespace blink