Implement URLSearchParams.

Source/core/dom/DOMURL.cpp

Index: Source/core/dom/DOMURL.cpp
diff --git a/Source/core/dom/DOMURL.cpp b/Source/core/dom/DOMURL.cpp
index 8881223f72445c4d4933110e6246154d56d8229f..655de39b6bcc286bb44608ce2f70b06011647a95 100644
--- a/Source/core/dom/DOMURL.cpp
+++ b/Source/core/dom/DOMURL.cpp
@@ -43,12 +43,17 @@ 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(this);
 }
 
 void DOMURL::setInput(const String& value)
@@ -61,6 +66,7 @@ void DOMURL::setInput(const String& value)
         m_url = KURL();
         m_input = value;
     }
+    DOMURLUtils::update(this);
 }
 
 String DOMURL::createObjectURL(ExecutionContext* executionContext, Blob* blob)