Mode clean-up pt 1: rename classic/non-strict mode to sloppy mode

test/mjsunit/harmony/proxies-example-membrane.js

Index: test/mjsunit/harmony/proxies-example-membrane.js
diff --git a/test/mjsunit/harmony/proxies-example-membrane.js b/test/mjsunit/harmony/proxies-example-membrane.js
index 9e2228a638d24338fb046d583b0d499e27179c18..a645a6603a159542529bdb88660cefe79bea07f2 100644
--- a/test/mjsunit/harmony/proxies-example-membrane.js
+++ b/test/mjsunit/harmony/proxies-example-membrane.js
@@ -72,7 +72,7 @@ function createHandler(obj) {
     hasOwn: function(name) { return ({}).hasOwnProperty.call(obj, name); },
     get: function(receiver, name) { return obj[name]; },
     set: function(receiver, name, val) {
-      obj[name] = val;  // bad behavior when set fails in non-strict mode
+      obj[name] = val;  // bad behavior when set fails in sloppy mode
       return true;
     },
     enumerate: function() {