Fix induction variable detection.

Review URL: https://codereview.chromium.org/12919005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13977 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen-instructions.cc

@@ -174,7 +174,7 @@ bool HValue::IsRelationTrue(NumericRelation relation,
                             int offset,
                             int scale) {
   if (this == other) {
-    return NumericRelation::Eq().Implies(relation);
+    return scale == 0 && relation.IsExtendable(offset);
   }
 
   // Test the direct relation.