Remove obsolete methods from IPC::Channel and related classes.

content/common/zygote_commands_linux.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 CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_
 #define CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_
 
 #include <stddef.h>
 
 #include "base/posix/global_descriptors.h"
@@ skipping 10 matching lines @@
 static const char kZygoteHelloMessage[] = "ZYGOTE_OK";
 
 // Message sent by zygote children to the browser so the browser can discover
 // the sending child's process ID.
 static const char kZygoteChildPingMessage[] = "CHILD_PING";
 
 // Maximum allowable length for messages sent to the zygote.
 const size_t kZygoteMaxMessageLength = 8192;
 
 // File descriptors initialized by the Zygote Host
-const int kZygoteSocketPairFd =
-    kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor;
+const int kZygoteSocketPairFd = base::GlobalDescriptors::kBaseDescriptor;
 
 // These are the command codes used on the wire between the browser and the
 // zygote.
 enum {
   // Fork off a new renderer.
   kZygoteCommandFork = 0,
 
   // Reap a renderer child.
   kZygoteCommandReap = 1,
 
   // Check what happened to a child process.
   kZygoteCommandGetTerminationStatus = 2,
 
   // Read a bitmask of kSandboxLinux*
   kZygoteCommandGetSandboxStatus = 3,
 
   // Not a real zygote command, but a subcommand used during the zygote fork
   // protocol.  Sends the child's PID as seen from the browser process.
   kZygoteCommandForkRealPID = 4
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_