Add mock classes for Bus, ObjectProxy, and ExportedObject.

dbus/exported_object.h

 // Copyright (c) 2011 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 DBUS_EXPORTED_OBJECT_H_
 #define DBUS_EXPORTED_OBJECT_H_
 #pragma once
 
 #include <string>
 #include <map>
@@ skipping 68 matching lines @@
   // Requests to send the signal from this object. The signal will be sent
   // asynchronously from the message loop in the D-Bus thread.
   virtual void SendSignal(Signal* signal);
 
   // Unregisters the object from the bus. The Bus object will take care of
   // unregistering so you don't have to do this manually.
   //
   // BLOCKING CALL.
   virtual void Unregister();
 
+ protected:
+  // This is protected, so we can define sub classes.
+  virtual ~ExportedObject();
+
  private:
   friend class base::RefCountedThreadSafe<ExportedObject>;
-  virtual ~ExportedObject();
 
   // Helper function for ExportMethod().
   void ExportMethodInternal(const std::string& interface_name,
                             const std::string& method_name,
                             MethodCallCallback method_call_callback,
                             OnExportedCallback exported_callback);
 
   // Called when the object is exported.
   void OnExported(OnExportedCallback on_exported_callback,
                   const std::string& interface_name,
@@ skipping 39 matching lines @@
 
   // The method table where keys are absolute method names (i.e. interface
   // name + method name), and values are the corresponding callbacks.
   typedef std::map<std::string, MethodCallCallback> MethodTable;
   MethodTable method_table_;
 };
 
 }  // namespace dbus
 
 #endif  // DBUS_EXPORTED_OBJECT_H_