Make the Isolate parameter mandatory for internal HandleScopes.

src/handles.h

 // Copyright 2011 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 101 matching lines @@
 // handle scope and a new one is created, all allocations will take
 // place in the new handle scope until it is deleted.  After that,
 // new handles will again be allocated in the original handle scope.
 //
 // After the handle scope of a local handle has been deleted the
 // garbage collector will no longer track the object stored in the
 // handle and may deallocate it.  The behavior of accessing a handle
 // for which the handle scope has been deleted is undefined.
 class HandleScope {
  public:
-  inline HandleScope();
   explicit inline HandleScope(Isolate* isolate);
 
   inline ~HandleScope();
 
   // Counts the number of allocated handles.
   static int NumberOfHandles();
 
   // Creates a new handle with the given value.
   template <typename T>
   static inline T** CreateHandle(T* value, Isolate* isolate);
@@ skipping 229 matching lines @@
   inline AllowHandleDereference();
   inline ~AllowHandleDereference();
  private:
   bool old_state_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_H_