Cleanup: Remove unneeded forward declarations in ppapi.

ppapi/native_client/src/trusted/plugin/service_runtime.h

 /* -*- c++ -*- */
 /*
  * 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.
  */
 
 // A class containing information regarding a socket connection to a
 // service runtime instance.
 
@@ skipping 18 matching lines @@
 class DescWrapper;
 struct SelLdrLauncher;
 }  // namespace
 
 namespace plugin {
 
 class BrowserInterface;
 class ErrorInfo;
 class Plugin;
 class SrpcClient;
-class SrtSocket;
-class ScriptableHandle;
 class ServiceRuntime;
 
 // Callback resources are essentially our continuation state.
 
 struct LogToJavaScriptConsoleResource {
  public:
   explicit LogToJavaScriptConsoleResource(std::string msg)
       : message(msg) {}
   std::string message;
 };
@@ skipping 148 matching lines @@
 
   PluginReverseInterface* rev_interface_;
 
   NaClMutex mu_;
   int exit_status_;
 };
 
 }  // namespace plugin
 
 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SERVICE_RUNTIME_H_