Internalize strings in-place

src/heap/objects-visiting.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_VISITING_H_
 #define V8_OBJECTS_VISITING_H_
 
 #include "src/allocation.h"
 #include "src/heap/heap.h"
 #include "src/heap/spaces.h"
@@ skipping 60 matching lines @@
   V(Struct3)               \
   V(Struct4)               \
   V(Struct5)               \
   V(Struct6)               \
   V(Struct7)               \
   V(Struct8)               \
   V(Struct9)               \
   V(StructGeneric)         \
   V(ConsString)            \
   V(SlicedString)          \
+  V(ThinString)            \
   V(Symbol)                \
   V(Oddball)               \
   V(Code)                  \
   V(Map)                   \
   V(Cell)                  \
   V(PropertyCell)          \
   V(WeakCell)              \
   V(TransitionArray)       \
   V(SharedFunctionInfo)    \
   V(JSFunction)            \
@@ skipping 361 matching lines @@
 // the next element. Given the head of the list, this function removes dead
 // elements from the list and if requested records slots for next-element
 // pointers. The template parameter T is a WeakListVisitor that defines how to
 // access the next-element pointers.
 template <class T>
 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer);
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_VISITING_H_