Revert "Hide Isolate pointer from embedder"

runtime/vm/port.h

 // Copyright (c) 2011, the Dart 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 file.
 
 #ifndef VM_PORT_H_
 #define VM_PORT_H_
 
 #include "include/dart_api.h"
 #include "vm/allocation.h"
 #include "vm/globals.h"
 #include "vm/random.h"
 
 namespace dart {
 
 class Isolate;
 class Message;
 class MessageHandler;
 class Mutex;
 class PortMapTestPeer;
 
-class PortMap : public AllStatic {
+class PortMap: public AllStatic {
  public:
   enum PortState {
     kNewPort = 0,      // a newly allocated port
     kLivePort = 1,     // a regular port (has a ReceivePort)
     kControlPort = 2,  // a special control port (has a ReceivePort)
   };
 
   // Allocate a port for the provided handler and return its VM-global id.
   static Dart_Port CreatePort(MessageHandler* handler);
 
@@ skipping 58 matching lines @@
   static intptr_t capacity_;
   static intptr_t used_;
   static intptr_t deleted_;
 
   static Random* prng_;
 };
 
 }  // namespace dart
 
 #endif  // VM_PORT_H_