Switch from new Base() to Base.set({}) where possible.

src/item/HitResult.js

@@ -107,7 +107,7 @@ var HitResult = Base.extend(/** @lends HitResult# */{
          * @private
          */
         getOptions: function(options) {
-            return new Base({
+            return Base.set({
                 // Type of item, for instanceof check: Group, Layer, Path,
                 // CompoundPath, Shape, Raster, SymbolItem, ...
                 type: null,

src/item/Item.js

@@ -30,8 +30,8 @@ var Item = Base.extend(Emitter, /** @lends Item# */{
          */
         extend: function extend(src) {
             if (src._serializeFields)
-                src._serializeFields = new Base(
+                src._serializeFields = Base.set({},
-                        this.prototype._serializeFields, src._serializeFields);
+                    this.prototype._serializeFields, src._serializeFields);
             return extend.base.apply(this, arguments);
         },
 

src/path/CompoundPath.js

@@ -266,7 +266,7 @@ var CompoundPath = PathItem.extend(/** @lends CompoundPath# */{
                 // compound path forms one shape.
                 // Also support legacy format `type: 'path'`.
                 options.class === Path || options.type === 'path' ? options
-                    : new Base(options, { fill: false }));
+                    : Base.set({}, options, { fill: false }));
     },
 
     _draw: function(ctx, param, strokeMatrix) {

src/style/Style.js

@@ -90,7 +90,7 @@ var Style = Base.extend(new function() {
         selectedColor: null
     },
     // For TextItem, override default fillColor and add text-specific properties
-    textDefaults = new Base(defaults, {
+    textDefaults = Base.set({}, defaults, {
         fillColor: new Color(), // black
         // Characters
         fontFamily: 'sans-serif',

test/helpers.js

@@ -408,7 +408,7 @@ var comparators = {
                 // Cloning SymbolItems does not result in cloned
                 // SymbolDefinitions
                 options && options.cloned
-                        ? new Base(options, { cloned: false })
+                        ? Base.set({}, options, { cloned: false })
                         : options,
                 ['symbol']);
     },