Always report access control failure if accessing unsupported URL.

Source/platform/weborigin/SchemeRegistry.cpp

Index: Source/platform/weborigin/SchemeRegistry.cpp
diff --git a/Source/platform/weborigin/SchemeRegistry.cpp b/Source/platform/weborigin/SchemeRegistry.cpp
index 1b9134e966bf33887396874b7854239d27ab6f65..96cc09357431a742dd93683a9a45875050dee0c3 100644
--- a/Source/platform/weborigin/SchemeRegistry.cpp
+++ b/Source/platform/weborigin/SchemeRegistry.cpp
@@ -28,6 +28,7 @@
 #include "platform/weborigin/SchemeRegistry.h"
 
 #include "wtf/MainThread.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace WebCore {
 
@@ -256,6 +257,23 @@ bool SchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(const String& scheme)
     return CORSEnabledSchemes().contains(scheme);
 }
 
+String SchemeRegistry::listOfCORSEnabledURLSchemes()
+{
+    StringBuilder builder;
+    const URLSchemesMap& corsEnabledSchemes = CORSEnabledSchemes();
+
+    bool addSeparator = false;
+    for (URLSchemesMap::const_iterator it = corsEnabledSchemes.begin(); it != corsEnabledSchemes.end(); ++it) {
+        if (addSeparator)
+            builder.append(", ");
+        else
+            addSeparator = true;
+
+        builder.append(*it);
+    }
+    return builder.toString();
+}
+
 void SchemeRegistry::registerURLSchemeAsBypassingContentSecurityPolicy(const String& scheme)
 {
     ContentSecurityPolicyBypassingSchemes().add(scheme);