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diff --git a/sandbox/src/broker_services.h b/sandbox/src/broker_services.h
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+// Copyright (c) 2012 The Chromium 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 SANDBOX_SRC_BROKER_SERVICES_H__
+#define SANDBOX_SRC_BROKER_SERVICES_H__
+
+#include <list>
+#include <map>
+#include <set>
+#include "base/basictypes.h"
+#include "base/win/scoped_handle.h"
+#include "sandbox/src/crosscall_server.h"
+#include "sandbox/src/job.h"
+#include "sandbox/src/sandbox.h"
+#include "sandbox/src/sharedmem_ipc_server.h"
+#include "sandbox/src/win2k_threadpool.h"
+#include "sandbox/src/win_utils.h"
+
+namespace {
+
+struct JobTracker;
+struct PeerTracker;
+
+}  // namespace
+
+namespace sandbox {
+
+class PolicyBase;
+
+// BrokerServicesBase ---------------------------------------------------------
+// Broker implementation version 0
+//
+// This is an implementation of the interface BrokerServices and
+// of the associated TargetProcess interface. In this implementation
+// TargetProcess is a friend of BrokerServices where the later manages a
+// collection of the former.
+class BrokerServicesBase : public BrokerServices,
+                           public SingletonBase<BrokerServicesBase>  {
+ public:
+  BrokerServicesBase();
+
+  ~BrokerServicesBase();
+
+  // The next five methods are the BrokerServices interface
+  virtual ResultCode Init();
+
+  virtual TargetPolicy* CreatePolicy();
+
+  virtual ResultCode SpawnTarget(const wchar_t* exe_path,
+                                 const wchar_t* command_line,
+                                 TargetPolicy* policy,
+                                 PROCESS_INFORMATION* target);
+
+  virtual ResultCode WaitForAllTargets();
+
+  virtual ResultCode AddTargetPeer(HANDLE peer_process);
+
+  // Checks if the supplied process ID matches one of the broker's active
+  // target processes
+  // Returns:
+  //   true if there is an active target process for this ID, otherwise false.
+  bool IsActiveTarget(DWORD process_id);
+
+ private:
+  // Releases the Job and notifies the associated Policy object to its
+  // resources as well.
+  static void FreeResources(JobTracker* tracker);
+
+  // The routine that the worker thread executes. It is in charge of
+  // notifications and cleanup-related tasks.
+  static DWORD WINAPI TargetEventsThread(PVOID param);
+
+  // Removes a target peer from the process list if it expires.
+  static VOID CALLBACK RemovePeer(PVOID parameter, BOOLEAN timeout);
+
+  // The completion port used by the job objects to communicate events to
+  // the worker thread.
+  HANDLE job_port_;
+
+  // Handle to a manual-reset event that is signaled when the total target
+  // process count reaches zero.
+  HANDLE no_targets_;
+
+  // Handle to the worker thread that reacts to job notifications.
+  HANDLE job_thread_;
+
+  // Lock used to protect the list of targets from being modified by 2
+  // threads at the same time.
+  CRITICAL_SECTION lock_;
+
+  // provides a pool of threads that are used to wait on the IPC calls.
+  ThreadProvider* thread_pool_;
+
+  // List of the trackers for closing and cleanup purposes.
+  typedef std::list<JobTracker*> JobTrackerList;
+  JobTrackerList tracker_list_;
+
+  // Maps peer process IDs to the saved handle and wait event.
+  // Prevents peer callbacks from accessing the broker after destruction.
+  typedef std::map<DWORD, PeerTracker*> PeerTrackerMap;
+  PeerTrackerMap peer_map_;
+
+  // Provides a fast lookup to identify sandboxed processes.
+  std::set<DWORD> child_process_ids_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrokerServicesBase);
+};
+
+}  // namespace sandbox
+
+
+#endif  // SANDBOX_SRC_BROKER_SERVICES_H__