NaCl: Remove getpid() calls from the PPAPI proxy

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

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.h
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.h b/ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.h
index 37ee753aac7dd4d00a2193fc3e190ac9fa6cf8e6..f5212cb656aecccb124cd5ae4b50fe1b9b3765dc 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.h
+++ b/ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.h
@@ -30,7 +30,6 @@ class BrowserPpp {
   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),
@@ -72,7 +71,6 @@ class BrowserPpp {
   }
 
   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; }
@@ -82,8 +80,6 @@ class BrowserPpp {
   // 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_;