get rid of ipc_descriptors.h

It is mostly unused, there is only one constant in that header file,
which is "used" at content/public/common/content_descriptors.h. But
let's just use 0 there, and remove this header file now.

BUG=None

TBR=bradnelson@chromium.org,isherman@chromium.org

Change-Id: Ibb768b429f79693f5b85f0ea47d037cf954badfd
Reviewed-on: https://chromium-review.googlesource.com/520942
Commit-Queue: Thiago Farina <tfarina@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Ken Rockot <rockot@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476486}

chrome/utility/importer/firefox_importer_unittest_utils_mac.cc

@@ -24,7 +24,6 @@
 #include "content/public/common/content_descriptors.h"
 #include "content/public/common/mojo_channel_switches.h"
 #include "ipc/ipc_channel.h"
-#include "ipc/ipc_descriptors.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_message.h"
 #include "mojo/edk/embedder/embedder.h"

components/nacl/loader/nacl_helper_linux.cc

@@ -39,7 +39,6 @@
 #include "content/public/common/mojo_channel_switches.h"
 #include "content/public/common/send_zygote_child_ping_linux.h"
 #include "content/public/common/zygote_fork_delegate_linux.h"
-#include "ipc/ipc_descriptors.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "sandbox/linux/services/credentials.h"
 #include "sandbox/linux/services/namespace_sandbox.h"

content/app/android/child_process_service_impl.cc

@@ -23,7 +23,6 @@
 #include "content/public/common/content_switches.h"
 #include "gpu/ipc/common/android/scoped_surface_request_conduit.h"
 #include "gpu/ipc/common/gpu_surface_lookup.h"
-#include "ipc/ipc_descriptors.h"
 #include "jni/ChildProcessServiceImpl_jni.h"
 #include "services/service_manager/embedder/shared_file_util.h"
 #include "services/service_manager/embedder/switches.h"

content/app/content_main_runner.cc

@@ -54,7 +54,6 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/sandbox_init.h"
-#include "ipc/ipc_descriptors.h"
 #include "media/base/media.h"
 #include "ppapi/features/features.h"
 #include "services/service_manager/embedder/switches.h"

content/common/zygote_commands_linux.h

@@ -8,7 +8,6 @@
 #include <stddef.h>
 
 #include "base/posix/global_descriptors.h"
-#include "ipc/ipc_descriptors.h"
 
 namespace content {
 

content/public/common/content_descriptors.h

@@ -6,12 +6,11 @@
 #define CONTENT_PUBLIC_COMMON_CONTENT_DESCRIPTORS_H_
 
 #include "build/build_config.h"
-#include "ipc/ipc_descriptors.h"
 
 // This is a list of global descriptor keys to be used with the
 // base::GlobalDescriptors object (see base/posix/global_descriptors.h)
 enum {
-  kCrashDumpSignal = kIPCDescriptorMax,
+  kCrashDumpSignal = 0,
   kSandboxIPCChannel,  // https://chromium.googlesource.com/chromium/src/+/master/docs/linux_sandbox_ipc.md
   kMojoIPCChannel,
   kFieldTrialDescriptor,

ipc/BUILD.gn

@@ -40,7 +40,6 @@ component("ipc") {
     "ipc_channel_proxy.h",
     "ipc_channel_reader.cc",
     "ipc_channel_reader.h",
-    "ipc_descriptors.h",
     "ipc_export.h",
     "ipc_listener.h",
     "ipc_logging.cc",

ipc/ipc_descriptors.h

-// Copyright (c) 2009 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 IPC_IPC_DESCRIPTORS_H_
-#define IPC_IPC_DESCRIPTORS_H_
-
-// This is a list of global descriptor keys to be used with the
-// base::GlobalDescriptors object (see base/posix/global_descriptors.h)
-enum {
-  // The first key that can be use to register descriptors.
-  kIPCDescriptorMax = 0
-};
-
-#endif  // IPC_IPC_DESCRIPTORS_H_

tools/ipc_fuzzer/message_replay/replay_process.cc

@@ -17,7 +17,6 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/mojo_channel_switches.h"
 #include "ipc/ipc_channel_mojo.h"
-#include "ipc/ipc_descriptors.h"
 #include "mojo/edk/embedder/configuration.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/incoming_broker_client_invitation.h"