[REF] web: make getContext and getDomain part of dataPoints

Before this commit, the getContext and getDomain functions of a
dataPoint were only available from a BasicModel "get" call result.
As the code is moving towards the creation of a DataPoint class,
these two functions should be a part of the dataPoint itself.

addons/web/static/src/js/views/basic/basic_model.js

@@ -26,6 +26,8 @@ odoo.define('web.BasicModel', function (require) {
  *      fieldNames: {string[]},
  *      fields: {Object},
  *      fieldAttrs: {Object},
+ *      getContext: {function},
+ *      getDomain: {function},
  *      groupedBy: {string[]},
  *      id: {integer},
  *      isOpen: {boolean},
@@ -372,9 +374,6 @@ var BasicModel = AbstractModel.extend({
         delete element.relation_field;
         delete element.rawContext;
 
-        element.getContext = this._getContext.bind(this, record);
-        element.getDomain = this._getDomain.bind(this, record);
-
         return element;
     },
     /**
@@ -1772,6 +1771,9 @@ var BasicModel = AbstractModel.extend({
             value: value,
         };
 
+        dataPoint.getContext = this._getContext.bind(this, dataPoint);
+        dataPoint.getDomain = this._getDomain.bind(this, dataPoint);
+
         this.localData[dataPoint.id] = dataPoint;
 
         return dataPoint;