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

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index ca2da30472effb406677e912e6e6225dd5a175e7..ae48458433d64b2df4e30190841f13cdc329af28 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -1074,15 +1074,15 @@ function FormatErrorString(error) {
 
 function GetStackFrames(raw_stack) {
   var frames = new InternalArray();
-  var non_strict_frames = raw_stack[0];
+  var sloppy_frames = raw_stack[0];
   for (var i = 1; i < raw_stack.length; i += 4) {
     var recv = raw_stack[i];
     var fun = raw_stack[i + 1];
     var code = raw_stack[i + 2];
     var pc = raw_stack[i + 3];
     var pos = %FunctionGetPositionForOffset(code, pc);
-    non_strict_frames--;
-    frames.push(new CallSite(recv, fun, pos, (non_strict_frames < 0)));
+    sloppy_frames--;
+    frames.push(new CallSite(recv, fun, pos, (sloppy_frames < 0)));
   }
   return frames;
 }