Change gpu/ipc:command_buffer_sources to static_library

gpu/ipc/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 
 group("command_buffer") {
   if (is_component_build) {
     public_deps = [
       "//gpu",
     ]
   } else {
     public_deps = [
       ":command_buffer_sources",
     ]
   }
 }
 
-source_set("command_buffer_sources") {
+if (is_component_build) {
+  link_target_type = "source_set"
+} else {
+  link_target_type = "static_library"
+}
+target(link_target_type, "command_buffer_sources") {
   visibility = [ "//gpu/*" ]
   sources = [
     "gpu_in_process_thread_service.cc",
     "gpu_in_process_thread_service.h",
     "in_process_command_buffer.cc",
     "in_process_command_buffer.h",
   ]
 
   configs += [ "//gpu:gpu_implementation" ]
 
@@ skipping 25 matching lines @@
     "//base",
     "//base/third_party/dynamic_annotations",
     "//gpu",
     "//gpu/command_buffer/client:gles2_implementation",
     "//gpu/command_buffer/common:gles2_utils",
     "//gpu/ipc:command_buffer",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }