Non-SFI mode: Use dummy PID for NaCl's IPC channel on Linux platform.

ipc/ipc_channel_posix.h

Index: ipc/ipc_channel_posix.h
diff --git a/ipc/ipc_channel_posix.h b/ipc/ipc_channel_posix.h
index 1cb76102c3905eba818929ed536a73f47f048111..4ec822feb8a2bca2b8e23a8b75ae31b9937f81a5 100644
--- a/ipc/ipc_channel_posix.h
+++ b/ipc/ipc_channel_posix.h
@@ -85,9 +85,6 @@ class IPC_EXPORT ChannelPosix : public Channel,
   void CloseClientFileDescriptor();
 
   static bool IsNamedServerInitialized(const std::string& channel_id);
-#if defined(OS_LINUX)
-  static void SetGlobalPid(int pid);
-#endif  // OS_LINUX
 
  private:
   bool CreatePipe(const IPC::ChannelHandle& channel_handle);
@@ -212,11 +209,6 @@ class IPC_EXPORT ChannelPosix : public Channel,
   // True if we are responsible for unlinking the unix domain socket file.
   bool must_unlink_;
 
-#if defined(OS_LINUX)
-  // If non-zero, overrides the process ID sent in the hello message.
-  static int global_pid_;
-#endif  // OS_LINUX
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelPosix);
 };