[Presentation API / Media Router] Relax PresentationRequest URL check.

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()) {
     exception_state.ThrowDOMException(kNotSupportedError,
                                       "Do not support empty sequence of URLs.");
     return nullptr;
   }
 
   Vector<KURL> parsed_urls(urls.size());
   for (size_t i = 0; i < urls.size(); ++i) {
     const KURL& parsed_url = KURL(execution_context->Url(), urls[i]);
 
-    if (!parsed_url.IsValid() || !(parsed_url.ProtocolIsInHTTPFamily() ||
-                                   parsed_url.ProtocolIs("cast"))) {
+    if (!parsed_url.IsValid()) {
       exception_state.ThrowDOMException(
           kSyntaxError, "'" + urls[i] + "' can't be resolved to a valid URL.");
       return nullptr;
     }
 
-    if (MixedContentChecker::IsMixedContent(
+    if (parsed_url.ProtocolIsInHTTPFamily() &&
+        MixedContentChecker::IsMixedContent(
             execution_context->GetSecurityOrigin(), parsed_url)) {
       exception_state.ThrowSecurityError(
           "Presentation of an insecure document [" + urls[i] +
           "] is prohibited from a secure context.");
       return nullptr;
     }
 
     parsed_urls[i] = parsed_url;
   }
   return new PresentationRequest(execution_context, parsed_urls);
@@ skipping 126 matching lines @@
   if (execution_context->IsSecureContext()) {
     UseCounter::Count(execution_context,
                       UseCounter::kPresentationRequestSecureOrigin);
   } else {
     UseCounter::Count(execution_context,
                       UseCounter::kPresentationRequestInsecureOrigin);
   }
 }
 
 }  // namespace blink