Implement <select> Popup Menu using PagePopup

Source/core/page/PagePopupClient.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #ifndef PagePopupClient_h
 #define PagePopupClient_h
 
 #include "platform/SharedBuffer.h"
 #include "platform/geometry/IntRect.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
+class Document;
 class Element;
 class Locale;
 
 class PagePopupClient {
 public:
     virtual IntSize contentSize() = 0;
 
     // Provide an HTML source to the specified buffer. The HTML
     // source is rendered in a PagePopup.
     // The content HTML supports:
     //  - No <select> popups
     //  - window.setValueAndClosePopup(number, string).
     virtual void writeDocument(SharedBuffer*) = 0;
 
+    // This is called after the document is ready to do additionary setup.
+    virtual void didWriteDocument(Document&) = 0;
+
     virtual Element& ownerElement() = 0;
     // Returns a Locale object associated to the client.
     virtual Locale& locale() = 0;
 
     // This is called by the content HTML of a PagePopup.
     // An implementation of this function should call ChromeClient::closePagePopup().
     virtual void setValueAndClosePopup(int numValue, const String& stringValue) = 0;
 
     // This is called by the content HTML of a PagePopup.
     virtual void setValue(const String&) = 0;
@@ skipping 18 matching lines @@
 };
 
 inline void PagePopupClient::addString(const String& str, SharedBuffer* data)
 {
     CString str8 = str.utf8();
     data->append(str8.data(), str8.length());
 }
 
 }
 #endif