perf($compile): move ng-binding class stamping for interpolation into compile phase

Author: IgorMinar

src/ng/compile.js

@@ -1847,18 +1847,26 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
       if (interpolateFn) {
         directives.push({
           priority: 0,
-          compile: valueFn(function textInterpolateLinkFn(scope, node) {
-            var parent = node.parent(),
-                bindings = parent.data('$binding') || [];
-            // Need to interpolate again in case this is using one-time bindings in multiple clones
-            // of transcluded templates.
-            interpolateFn = $interpolate(text);
-            bindings.push(interpolateFn);
-            safeAddClass(parent.data('$binding', bindings), 'ng-binding');
-            scope.$watch(interpolateFn, function interpolateFnWatchAction(value) {
-              node[0].nodeValue = value;
-            });
-          })
+          compile: function textInterpolateCompileFn(templateNode) {
+            // when transcluding a template that has bindings in the root
+            // then we don't have a parent and should do this in the linkFn
+            var parent = templateNode.parent(), hasCompileParent = parent.length;
+            if (hasCompileParent) safeAddClass(templateNode.parent(), 'ng-binding');
+
+            return function textInterpolateLinkFn(scope, node) {
+              var parent = node.parent(),
+                  bindings = parent.data('$binding') || [];
+              // Need to interpolate again in case this is using one-time bindings in multiple clones
+              // of transcluded templates.
+              interpolateFn = $interpolate(text);
+              bindings.push(interpolateFn);
+              parent.data('$binding', bindings);
+              if (!hasCompileParent) safeAddClass(parent, 'ng-binding');
+              scope.$watch(interpolateFn, function interpolateFnWatchAction(value) {
+                node[0].nodeValue = value;
+              });
+            };
+          }
         });
       }
     }