Move ContextMenu* files from core/ to platform/

Source/platform/ContextMenuItem.h

Index: Source/platform/ContextMenuItem.h
diff --git a/Source/core/platform/ContextMenuItem.h b/Source/platform/ContextMenuItem.h
similarity index 97%
rename from Source/core/platform/ContextMenuItem.h
rename to Source/platform/ContextMenuItem.h
index 67cc7c4e61ba58c7ced15a30dc9bce41ce8e3ab2..a3bf8533d609562ff69cb4dca1fc36807b4f81c2 100644
--- a/Source/core/platform/ContextMenuItem.h
+++ b/Source/platform/ContextMenuItem.h
@@ -27,6 +27,7 @@
 #ifndef ContextMenuItem_h
 #define ContextMenuItem_h
 
+#include "platform/PlatformExport.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/text/WTFString.h"
 
@@ -47,7 +48,7 @@ namespace WebCore {
         SubmenuType
     };
 
-    class ContextMenuItem {
+    class PLATFORM_EXPORT ContextMenuItem {
         WTF_MAKE_FAST_ALLOCATED;
     public:
         ContextMenuItem(ContextMenuItemType, ContextMenuAction, const String&, ContextMenu* subMenu = 0);