gpu: Remove some ipc code no longer used.

content/common/establish_channel_params.cc

Index: content/common/establish_channel_params.cc
diff --git a/content/common/establish_channel_params.cc b/content/common/establish_channel_params.cc
deleted file mode 100644
index 6ca5ac6a7bcdc2c4d07e1d770fffce508f26a721..0000000000000000000000000000000000000000
--- a/content/common/establish_channel_params.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2016 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.
-
-#include "content/common/establish_channel_params.h"
-
-namespace content {
-
-EstablishChannelParams::EstablishChannelParams()
-    : client_id(0),
-      client_tracing_id(0),
-      preempts(false),
-      allow_view_command_buffers(false),
-      allow_real_time_streams(false) {}
-
-EstablishChannelParams::~EstablishChannelParams() {}
-
-}  // namespace content