Rename fletch -> dartino

src/vm/weak_pointer.h

 // Copyright (c) 2014, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 #ifndef SRC_VM_WEAK_POINTER_H_
 #define SRC_VM_WEAK_POINTER_H_
 
-namespace fletch {
+namespace dartino {
 
 class HeapObject;
 class Space;
 class Heap;
 class PointerVisitor;
 
 typedef void (*WeakPointerCallback)(HeapObject* object, Heap* heap);
 
 class WeakPointer {
  public:
   WeakPointer(HeapObject* object, WeakPointerCallback callback,
               WeakPointer* next);
 
   static void Process(Space* garbage_space, WeakPointer** pointers, Heap* heap);
   static void ForceCallbacks(WeakPointer** pointers, Heap* heap);
   static void Remove(WeakPointer** pointers, HeapObject* object);
   static void PrependWeakPointers(WeakPointer** pointers,
                                   WeakPointer* to_be_prepended);
   static void Visit(WeakPointer* pointers, PointerVisitor* visitor);
 
  private:
   HeapObject* object_;
   WeakPointerCallback callback_;
   WeakPointer* prev_;
   WeakPointer* next_;
 };
 
-}  // namespace fletch
+}  // namespace dartino
 
 #endif  // SRC_VM_WEAK_POINTER_H_