[4.1.0] Grid Group's groupHeaderTpl does not have parent param

[ZachG]

REQUIRED INFORMATION
Ext version tested:

• Ext 4.1.0
• Build date: 2012-04-20 14:10:47 (19f55ab932145a3443b228045fa80950dfeaf9cc)

Browser versions tested against:

• Chrome

Description:

• In converting from 4.0.7, I noticed my groupHeaderTpl wasn't working.
• It was referencing the parent parameter, which is there in the documentation.
• That variable is now hardcoded to be an empty object.

Steps to reproduce the problem:

• Run the example code in 4.0.7 and 4.1.0

The result that was expected:

• parent would have a similar value in 4.1.0

The result that occurs instead:

• parent was an empty object

Test Case:

Ext.create("Ext.window.Window", {
    width:500,
    height:500,
    layout:"fit",
    items:[
        {
            xtype:"grid",
            store:{
                proxy:{
                    type:"memory",
                    reader:{
                        type:"json"
                    }
                },
                model:Ext.define("MyModel", {
                    extend:"Ext.data.Model",
                    fields:[
                        "group_name",
                        "col_1",
                        "col_2"
                    ]
                }),
                groupers:[
                    {
                        property:"group_name"
                    }
                ],
                data:[
                    {
                        group_name:"Group 1",
                        col_1:"11",
                        col_2:"12"
                    },
                    {
                        group_name:"Group 2",
                        col_1:"21",
                        col_2:"22"
                    },
                    {
                        group_name:"Group 3",
                        col_1:"31",
                        col_2:"32"
                    }
                ]
            },
            columns:[
                {
                    text:"Column 1",
                    dataIndex:"col_1"
                },
                {
                    text:"Column 2",
                    dataIndex:"col_2"
                }
            ],
            features:[
                {
                    ftype:"grouping",
                    groupHeaderTpl:"{[console.log(arguments)]} {name}"
                }
            ]
        }
    ]
}).show();

[ZachG]

Here is an abbreviated version of what I'm seeing:

ExtJS Version	values	parent
4.0.7	{fullWidth:200, name:"Group 1", rows:[{...}], viewId:"gridview-1102"}	{fullWidth:200, [{...},{..},{...}]}
4.1.0	{children:[{...}], fullWidth:200, name:"Group1", rows:[{...}], ...}	{}

The grid's tpl is calling Ext.grid.feature.Grouping.getFragmentTpl, and the .apply() on Ext.XTemplate calls Ext.XTemplate.applyOut. The third parameter on me.fn.call() is the hardcoded empty object.