Changes around ascii-check for strings wrt external strings.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 267880d7b88994db40c06c02b69787e09e49577a..06f02625569e2c23e9d7bb00a9992685ad59db78 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -290,8 +290,10 @@ bool String::IsAsciiRepresentationUnderneath() {
       return true;
     case kTwoByteStringTag:
       return false;
-    default:  // Cons or sliced string.  Need to go deeper.
-      return GetUnderlying()->IsAsciiRepresentation();
+    default:
+      // Cons or sliced string.  Need to go deeper.
+      // Consider slice of cons of externalized.
+      return GetUnderlying()->IsAsciiRepresentationUnderneath();

[Erik Corry, 2011/10/17 12:05:15]

Is it possible to make an arbitraryly deep nesting of a cons of a slice of a
cons of a slice of a...?  If so this risks recursing too deep.

   }
 }