Office 365 and hosting page in ClientWebPart using WebPartPages:AllowFraming

Hi,

I am getting the error "The type or namespace name 'WebPartPages' does not exist in the namespace 'Microsoft.SharePoint' (are you missing an assembly reference?)."  But I can't figure out what else should be in my references. 

I have created an SP 2013 app which I am deploying to an Office 365 Developer Sharepoint App like:https://MyDomain.sharepoint.com/sites/Dev/   I have been following  examples like "Can App Parts be used on SharePoint-Hosted pages?" (http://social.msdn.microsoft.com/Forums/sharepoint/en-US/abb96582-e5b1-4fbd-9e63-2ffc01780835/can-app-parts-be-used-on-sharepointhosted-pages

Under references I have

Microsoft.SharePoint.Client
Microsoft.SharePoint.Client.Publishing
Microsoft.SharePoint.Client.Runtime
Microsoft.Visualstudio.SharePoint

When I try to add a reference to Microsoft.Sharepoint - I don't see it in the list nor  a WebPartPages reference in the list.    My page looks like...

<%@ Page Inherits="Microsoft.SharePoint.WebPartPages.WebPartPage, Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" Language="C#" %><%@ Register TagPrefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %><%@ Register TagPrefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %><%@ Register TagPrefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %><!-- The following tells SharePoint to allow this page to be hosted in an IFrame --><WebPartPages:AllowFraming runat="server" />

Any advice how to correct what I am doing wrong?

Thanks

va