Add instance pass through unit test, and ensure the pre-compile step escapes the "_wrapped" property for Closure Compiler.

Former-commit-id: 4bb8f77bacdafdd6822564c18751310235679476

build/pre-compile.js

@@ -81,8 +81,8 @@
   /** Used protect the specified properties from getting minified */
   var propWhitelist = [
     '_',
+    '_wrapped',
     'amd',
-    'chain',
     'clearTimeout',
     'criteria',
     'escape',