Revert of Work on Windows GN component build.

gpu/ipc/BUILD.gn

 # Copyright 2014 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.
 
-group("ipc") {
-  if (is_component_build) {
-    public_deps = [
-      "//gpu",
-    ]
-  } else {
-    public_deps = [
-      ":ipc_sources",
-    ]
-  }
-}
-
-source_set("ipc_sources") {
-  visibility = [ "//gpu/*" ]
-
+source_set("ipc") {
   sources = [
     "gpu_command_buffer_traits.cc",
     "gpu_command_buffer_traits.h",
   ]
 
   configs += [
     "//gpu:gpu_implementation",
     "//third_party/khronos:khronos_headers",
   ]
 
   deps = [
-    "//gpu/command_buffer/common:common_sources",
+    "//gpu/command_buffer/common",
     "//ipc",
   ]
 }