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

test/mjsunit/regress/regress-2564.js

Index: test/mjsunit/regress/regress-2564.js
diff --git a/test/mjsunit/regress/regress-2564.js b/test/mjsunit/regress/regress-2564.js
index 1d7cdaeaea5bb6846e4a1f2812c3da6ac44378ea..21b40e0b095cbd139db215fb62eca32505b5d9f3 100644
--- a/test/mjsunit/regress/regress-2564.js
+++ b/test/mjsunit/regress/regress-2564.js
@@ -66,7 +66,7 @@ Error.prepareStackTrace = function(error, frames) {
   try {
     assertEquals(5, frames.length);
     for (var i = 0; i < 2; i++) {
-      // The first two frames are still classic mode.
+      // The first two frames are still sloppy mode.
       assertEquals(o[i], frames[i].getFunction());
       assertEquals(o, frames[i].getThis());
     }