Implement URLSearchParams.

Source/core/dom/DOMURL.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Motorola Mobility Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 25 matching lines @@
 #include "core/html/PublicURLManager.h"
 #include "platform/blob/BlobURL.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/MainThread.h"
 
 namespace WebCore {
 
 DOMURL::DOMURL(const String& url, const KURL& base, ExceptionState& exceptionState)
 {
     ScriptWrappable::init(this);
-    if (!base.isValid())
+    if (!base.isValid()) {
         exceptionState.throwDOMException(SyntaxError, "Invalid base URL");
+        return;
+    }
 
     m_url = KURL(base, url);
-    if (!m_url.isValid())
+    if (!m_url.isValid()) {
         exceptionState.throwDOMException(SyntaxError, "Invalid URL");
+        return;
+    }
+    DOMURLUtils::update();
 }
 
 void DOMURL::setInput(const String& value)
 {
     KURL url(blankURL(), value);
     if (url.isValid()) {
         m_url = url;
         m_input = String();
     } else {
         m_url = KURL();
         m_input = value;
     }
+    DOMURLUtils::update();
 }
 
 String DOMURL::createObjectURL(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
 {
     if (!executionContext || !blob)
         return String();
     if (blob->hasBeenClosed()) {
         exceptionState.throwDOMException(InvalidStateError, String(blob->isFile() ? "File" : "Blob") + " has been closed.");
         return String();
     }
@@ skipping 22 matching lines @@
 }
 
 void DOMURL::revokeObjectUUID(ExecutionContext* executionContext, const String& uuid)
 {
     if (!executionContext)
         return;
 
     executionContext->publicURLManager().revoke(uuid);
 }
 
+void DOMURL::trace(Visitor* visitor)
+{
+    DOMURLUtils::trace(visitor);
+}
+
 } // namespace WebCore