Remove IPC::Endpoint.

gpu/ipc/service/gpu_channel.h

Index: gpu/ipc/service/gpu_channel.h
diff --git a/gpu/ipc/service/gpu_channel.h b/gpu/ipc/service/gpu_channel.h
index 7ec9d25e618c762a7766132dd826b4a3778aba84..47c1ba63604df7fe0b6ed6da742fc4575d9acda9 100644
--- a/gpu/ipc/service/gpu_channel.h
+++ b/gpu/ipc/service/gpu_channel.h
@@ -114,6 +114,7 @@ class GPU_EXPORT GpuChannel
 
   // IPC::Listener implementation:
   bool OnMessageReceived(const IPC::Message& msg) override;
+  void OnChannelConnected(int32_t peer_pid) override;
   void OnChannelError() override;
 
   // IPC::Sender implementation:
@@ -276,6 +277,8 @@ class GPU_EXPORT GpuChannel
   // Can real time streams be created on this channel.
   const bool allow_real_time_streams_;
 
+  base::ProcessId peer_pid_;
+
   // Member variables should appear before the WeakPtrFactory, to ensure
   // that any WeakPtrs to Controller are invalidated before its members
   // variable's destructors are executed, rendering them invalid.