Implement URLSearchParams.

Source/core/dom/DOMURLUtils.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Motorola Mobility Inc.
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  * modification, are permitted provided that the following conditions
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 #ifndef DOMURLUtils_h
 #define DOMURLUtils_h
 
+#include "core/dom/DOMURLSearchParams.h"
 #include "core/dom/DOMURLUtilsReadOnly.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
+#include "wtf/text/WTFString.h"
+
+// FIXME: URLSearchParams depends on Oilpan, and it being used by
+// default for Node-derived objects (for HTMLAnchorElement.)
+// To enable testing before that is the case, use an ad-hoc
+// #define to protect the parts we're unable to support without
+// Oilpan.
+#if ENABLE(OILPAN)
+#define URLUTILS_SUPPORTS_SEARCHPARAMS 1
+#else
+#define URLUTILS_SUPPORTS_SEARCHPARAMS 0
+#endif
 
 namespace blink {
 
+class ExceptionState;
 class KURL;
 
-class DOMURLUtils : public DOMURLUtilsReadOnly {
+class DOMURLUtils : public DOMURLUtilsReadOnly, public WillBeGarbageCollectedMixin {
 public:
     virtual void setURL(const KURL&) = 0;
     virtual void setInput(const String&) = 0;
-    virtual ~DOMURLUtils() { };
+    virtual ~DOMURLUtils();
 
     void setHref(const String&);
 
     void setProtocol(const String&);
     void setUsername(const String&);
     void setPassword(const String&);
     void setHost(const String&);
     void setHostname(const String&);
     void setPort(const String&);
     void setPathname(const String&);
     void setSearch(const String&);
     void setHash(const String&);
+
+    void update();
+
+    DOMURLSearchParams* searchParams();
+    void setSearchParams(DOMURLSearchParams*, ExceptionState&);
+
+    virtual void trace(Visitor*);
+
+protected:
+    friend class DOMURLSearchParams;
+
+    void createSearchParams(const String&);
+    void updateSearchParams(const String&);
+
+    void setQuery(const String&);
+
+#if URLUTILS_SUPPORTS_SEARCHPARAMS
+    // Weakly refer to the searchParams object, so that it can be
+    // GCed if otherwise unused and unreferenced.
+    WeakMember<DOMURLSearchParams> m_searchParams;
+#endif
 };
 
 } // namespace blink
 
 #endif // DOMURLUtils_h