Add KURL::protocolIsJavascript member function

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 53d69df8b7bebd37217f1c7cac4ccafa9963ce8a..c7a8df4a374d98ce82e83be34ac22fb844d3a488 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -3417,18 +3417,16 @@ void Document::maybeHandleHttpRefresh(const String& content,
     return;
 
   double delay;
-  String refreshURL;
+  String refreshURLString;
   if (!parseHTTPRefresh(content, httpRefreshType == HttpRefreshFromMetaTag
                                      ? isHTMLSpace<UChar>
                                      : nullptr,
-                        delay, refreshURL))
+                        delay, refreshURLString))
     return;
-  if (refreshURL.isEmpty())
-    refreshURL = url().getString();
-  else
-    refreshURL = completeURL(refreshURL).getString();
+  KURL refreshURL =
+      refreshURLString.isEmpty() ? url() : completeURL(refreshURLString);
 
-  if (protocolIsJavaScript(refreshURL)) {
+  if (refreshURL.protocolIsJavaScript()) {
     String message =
         "Refused to refresh " + m_url.elidedString() + " to a javascript: URL";
     addConsoleMessage(ConsoleMessage::create(SecurityMessageSource,