Implement URLSearchParams.

Source/core/dom/DOMURLSearchParams.h

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-#ifndef SharedWorkerPerformance_h
-#define SharedWorkerPerformance_h
+#ifndef DOMURLSearchParams_h
+#define DOMURLSearchParams_h
 
-#include "platform/Supplementable.h"
+#include "bindings/v8/ScriptWrappable.h"
+#include "wtf/Forward.h"
+#include "wtf/RefCounted.h"
+#include "wtf/text/WTFString.h"
+#include <utility>
 
 namespace WebCore {
 
-class ExecutionContext;
-class SharedWorker;
+class DOMURLUtils;
 
-class SharedWorkerPerformance FINAL : public Supplement<SharedWorker> {
+class DOMURLSearchParams : public ScriptWrappable, public RefCounted<DOMURLSearchParams> {
 public:
-    virtual ~SharedWorkerPerformance();
-    static SharedWorkerPerformance* from(SharedWorker*);
+    static PassRefPtr<DOMURLSearchParams> create(const String& = String());
+    static PassRefPtr<DOMURLSearchParams> create(DOMURLSearchParams*);
 
-    static double workerStart(ExecutionContext*, SharedWorker*);
-    double getWorkerStart(ExecutionContext*, SharedWorker*) const;
+    String toString() const;
+
+    void appendNameValue(const String& name, const String& value);
+    void deleteAllWithName(const String&);
+    String getFirstValue(const String&) const;
+
+    Vector<String> getAllValues(const String&) const;
+    bool hasName(const String&) const;
+    void setNameValue(const String& name, const String& value);
+
+    void setInput(const String&);
+
+    void setURLObject(DOMURLUtils* urlObject) { m_urlObject = urlObject; }
+    DOMURLUtils* getURLObject() const { return m_urlObject; }
 
 private:
-    explicit SharedWorkerPerformance();
-    static const char* supplementName();
+    DOMURLSearchParams();
 
-    double m_timeOrigin;
+    void runUpdateSteps();
+
+    Vector<std::pair<String, String> > m_params;
+
+    // See FIXME in DOMURLUtils::setSearchParams() regarding the
+    // handling of this reference to the URL object.
+    DOMURLUtils* m_urlObject;
+    bool m_isUpdating;
 };
 
 } // namespace WebCore
 
-#endif // SharedWorkerPerformance_h
+#endif // DOMURLSearchParams_h