[Isolates] Pass isolate to VMState constructor.

src/global-handles.h

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 120 matching lines @@
 
   // Tear down the global handle structure.
   void TearDown();
 
 #ifdef DEBUG
   void PrintStats();
   void Print();
 #endif
   class Pool;
  private:
-  GlobalHandles();
+  explicit GlobalHandles(Isolate* isolate);
 
   // Internal node structure, one for each global handle.
   class Node;
 
+  Isolate* isolate_;
+
   // Field always containing the number of weak and near-death handles.
   int number_of_weak_handles_;
 
   // Field always containing the number of weak and near-death handles
   // to global objects.  These objects are also included in
   // number_of_weak_handles_.
   int number_of_global_object_weak_handles_;
 
   // Global handles are kept in a single linked list pointed to by head_.
   Node* head_;
@@ skipping 28 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(GlobalHandles);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBAL_HANDLES_H_