NaCl: Remove getpid() calls from the PPAPI proxy

ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.h

 // 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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_BROWSER_PPP_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_BROWSER_PPP_H_
 
 #include <stdarg.h>
 
 #include "native_client/src/include/nacl_macros.h"
@@ skipping 12 matching lines @@
 class Plugin;
 }
 
 namespace ppapi_proxy {
 
 class BrowserPpp {
  public:
   BrowserPpp(NaClSrpcChannel* main_channel, plugin::Plugin* plugin)
       : main_channel_(main_channel),
         is_nexe_alive_(true),
-        plugin_pid_(0),
         plugin_(plugin),
         ppp_instance_interface_(NULL),
         ppp_messaging_interface_(NULL),
         ppp_input_event_interface_(NULL) {
     CHECK(main_channel_ != NULL);
     upcall_thread_.tid = 0;
   }
 
   ~BrowserPpp() {}
 
@@ skipping 21 matching lines @@
   const PPP_InputEvent* ppp_input_event_interface() const {
     return ppp_input_event_interface_;
   }
 
   bool is_valid() const { return is_nexe_alive_; }
   static bool is_valid(BrowserPpp* proxy) {
     return (proxy != NULL && proxy->is_valid());
   }
 
   NaClSrpcChannel* main_channel() const { return main_channel_; }
-  int plugin_pid() const { return plugin_pid_; }
   plugin::Plugin* plugin() { return plugin_; }
 
   void ReportDeadNexe() { is_nexe_alive_ = false; }
 
  private:
   // The "main" SRPC channel used to communicate with the plugin.
   // NULL if proxy has been shut down.
   NaClSrpcChannel* main_channel_;
   bool is_nexe_alive_;
-  // The PID of the plugin.
-  int plugin_pid_;
   // Plugin that owns this proxy.
   plugin::Plugin* plugin_;
 
   // Set on module initialization.
   const PPP_Instance* ppp_instance_interface_;
   const PPP_Messaging* ppp_messaging_interface_;
   const PPP_InputEvent* ppp_input_event_interface_;
 
   // The thread used to handle calls on other than the main thread.
   struct NaClThread upcall_thread_;
   NACL_DISALLOW_COPY_AND_ASSIGN(BrowserPpp);
 };
 
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_BROWSER_PPP_H_