Implement contextmenu attribute with basic support of <menu>

Source/core/html/HTMLMenuElement.h

Index: Source/core/html/HTMLMenuElement.h
diff --git a/Source/core/html/HTMLMenuElement.h b/Source/core/html/HTMLMenuElement.h
index ed04da6b92bba914ef7dc025eb5099fb140ab24a..0ac2aeefcaa8e4e870e5c7bdfffed9b0856187ae 100644
--- a/Source/core/html/HTMLMenuElement.h
+++ b/Source/core/html/HTMLMenuElement.h
@@ -23,16 +23,34 @@
 #ifndef HTMLMenuElement_h
 #define HTMLMenuElement_h
 
+#include "core/html/CustomContextMenuProvider.h"
 #include "core/html/HTMLElement.h"
+#include "core/page/ContextMenuProvider.h"
+#include "platform/ContextMenu.h"
+#include "platform/ContextMenuItem.h"
 
 namespace blink {
 
+class HTMLMenuElement;
+
 class HTMLMenuElement FINAL : public HTMLElement {
 public:
     DECLARE_NODE_FACTORY(HTMLMenuElement);
 
+    virtual void defaultEventHandler(Event*) OVERRIDE;
+
+    CustomContextMenuProvider* menuProvider() { return m_menuProvider.get(); }
+    CustomContextMenuProvider& ensureMenuProvider();
+    void populateContextMenuItems(const HTMLMenuElement&, ContextMenu&);
+    HTMLElement* menuItemAt(unsigned menuId);
+    HTMLElement* subjectElement() { return m_subject.get(); }
+
 private:
     explicit HTMLMenuElement(Document&);
+
+    RefPtr<CustomContextMenuProvider> m_menuProvider;

[Inactive, 2014/07/23 14:19:08]

RefPtrWillBeMember

[pals, 2014/07/24 10:49:26]

Done.

+    RefPtr<HTMLElement> m_subject;

[Inactive, 2014/07/23 14:19:08]

RefPtrWillBeMember

[pals, 2014/07/24 10:49:26]

Done.

+    Vector<HTMLElement*> m_menuItems;

[Inactive, 2014/07/23 14:19:08]

Vector<HTMLMenuItemElement*> ?

[pals, 2014/07/24 10:49:26]

Done.

 };
 
 } //namespace