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

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index 6b2f48f0172b9bea33bcc7457ce7425d26963eab..64f61f2734228973e6557238b9861429c2851594 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -379,9 +379,9 @@ void ArrayLiteral::BuildConstantElements(Isolate* isolate) {
     } else if (boilerplate_value->IsUninitialized()) {
       is_simple = false;
       JSObject::SetOwnElement(
-          array, i, handle(Smi::FromInt(0), isolate), kNonStrictMode);
+          array, i, handle(Smi::FromInt(0), isolate), kSloppyMode);
     } else {
-      JSObject::SetOwnElement(array, i, boilerplate_value, kNonStrictMode);
+      JSObject::SetOwnElement(array, i, boilerplate_value, kSloppyMode);
     }
   }