Tentative implementation of string slices (hidden under the flag --string-slices).

src/objects-visiting.h

Index: src/objects-visiting.h
diff --git a/src/objects-visiting.h b/src/objects-visiting.h
index cc64763b5f5ff9c85e38d9ad325c32c01f0f517e..8e079abb0c8d4140191c5f3b3ff1337905832bbc 100644
--- a/src/objects-visiting.h
+++ b/src/objects-visiting.h
@@ -115,6 +115,7 @@ class StaticVisitorBase : public AllStatic {
     kVisitStructGeneric,
 
     kVisitConsString,
+    kVisitSlicedString,
     kVisitOddball,
     kVisitCode,
     kVisitMap,
@@ -298,6 +299,11 @@ class StaticNewSpaceVisitor : public StaticVisitorBase {
                                       ConsString::BodyDescriptor,
                                       int>::Visit);
 
+    table_.Register(kVisitSlicedString,
+                    &FixedBodyVisitor<StaticVisitor,
+                                      SlicedString::BodyDescriptor,
+                                      int>::Visit);
+
     table_.Register(kVisitFixedArray,
                     &FlexibleBodyVisitor<StaticVisitor,
                                          FixedArray::BodyDescriptor,