fix($compile): use createMap() for $$observe listeners when initialized from attr interpolation

test/ng/compileSpec.js

@@ -3218,6 +3218,23 @@ describe('$compile', function() {
       });
     });
 
+    it('should be able to interpolate attribute names which are present in Object.prototype', function() {
+      var attrs;
+      module(function() {
+        directive('attrExposer', valueFn({
+          link: function($scope, $element, $attrs) {
+            attrs = $attrs;
+          }
+        }));
+      });
+      inject(function($compile, $rootScope) {
+        $compile('<div attr-exposer to-string="{{1 + 1}}"  has-own-property="{{1 + 1}}">')($rootScope);
+        $rootScope.$apply();
+        expect(attrs.toString).toBe('2');
+        expect(attrs.hasOwnProperty).toBe('2');
+      });
+    });
+
 
     describe('bind-once', function() {