Fix //components/drive:drive_chromeos to only be defined on CrOS in GN.

components/drive/BUILD.gn

 # Copyright (c) 2015 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("//third_party/protobuf/proto_library.gni")
 
 static_library("drive") {
   sources = [
     "drive_api_util.cc",
     "drive_api_util.h",
@@ skipping 50 matching lines @@
     "//net:net",
     "//third_party/cacheinvalidation",
     "//third_party/leveldatabase",
     "//third_party/re2",
   ]
   public_deps = [
     ":proto",
   ]
 }
 
-static_library("drive_chromeos") {
-  sources = [
-    "chromeos/change_list_loader.cc",
-    "chromeos/change_list_loader.h",
-    "chromeos/change_list_loader_observer.h",
-    "chromeos/change_list_processor.cc",
-    "chromeos/change_list_processor.h",
-    "chromeos/directory_loader.cc",
-    "chromeos/directory_loader.h",
-    "chromeos/file_cache.cc",
-    "chromeos/file_cache.h",
-    "chromeos/file_system.cc",
-    "chromeos/file_system.h",
-    "chromeos/file_system/copy_operation.cc",
-    "chromeos/file_system/copy_operation.h",
-    "chromeos/file_system/create_directory_operation.cc",
-    "chromeos/file_system/create_directory_operation.h",
-    "chromeos/file_system/create_file_operation.cc",
-    "chromeos/file_system/create_file_operation.h",
-    "chromeos/file_system/download_operation.cc",
-    "chromeos/file_system/download_operation.h",
-    "chromeos/file_system/get_file_for_saving_operation.cc",
-    "chromeos/file_system/get_file_for_saving_operation.h",
-    "chromeos/file_system/move_operation.cc",
-    "chromeos/file_system/move_operation.h",
-    "chromeos/file_system/open_file_operation.cc",
-    "chromeos/file_system/open_file_operation.h",
-    "chromeos/file_system/operation_delegate.cc",
-    "chromeos/file_system/operation_delegate.h",
-    "chromeos/file_system/remove_operation.cc",
-    "chromeos/file_system/remove_operation.h",
-    "chromeos/file_system/search_operation.cc",
-    "chromeos/file_system/search_operation.h",
-    "chromeos/file_system/set_property_operation.cc",
-    "chromeos/file_system/set_property_operation.h",
-    "chromeos/file_system/touch_operation.cc",
-    "chromeos/file_system/touch_operation.h",
-    "chromeos/file_system/truncate_operation.cc",
-    "chromeos/file_system/truncate_operation.h",
-    "chromeos/file_system_interface.cc",
-    "chromeos/file_system_interface.h",
-    "chromeos/file_system_observer.h",
-    "chromeos/remove_stale_cache_files.cc",
-    "chromeos/remove_stale_cache_files.h",
-    "chromeos/resource_metadata.cc",
-    "chromeos/resource_metadata.h",
-    "chromeos/search_metadata.cc",
-    "chromeos/search_metadata.h",
-    "chromeos/sync/entry_revert_performer.cc",
-    "chromeos/sync/entry_revert_performer.h",
-    "chromeos/sync/entry_update_performer.cc",
-    "chromeos/sync/entry_update_performer.h",
-    "chromeos/sync/remove_performer.cc",
-    "chromeos/sync/remove_performer.h",
-    "chromeos/sync_client.cc",
-    "chromeos/sync_client.h",
-  ]
-  deps = [
-    ":drive",
-    "//base",
-    "//base:i18n",
-    "//components/prefs",
-    "//google_apis:google_apis",
-    "//net:net",
-  ]
-  public_deps = [
-    ":proto",
-  ]
-}
-
 proto_library("proto") {
   sources = [
     "drive.proto",
   ]
 }
 
 static_library("test_support") {
   testonly = true
   sources = [
     "service/dummy_drive_service.cc",
     "service/dummy_drive_service.h",
     "service/fake_drive_service.cc",
     "service/fake_drive_service.h",
     "service/test_util.cc",
     "service/test_util.h",
   ]
   deps = [
     ":drive",
     ":proto",
     "//base",
     "//components/prefs:test_support",
     "//content/test:test_support",
     "//google_apis:test_support",
     "//net:net",
   ]
 }
 
 if (is_chromeos) {
+  source_set("drive_chromeos") {
+    sources = [
+      "chromeos/change_list_loader.cc",
+      "chromeos/change_list_loader.h",
+      "chromeos/change_list_loader_observer.h",
+      "chromeos/change_list_processor.cc",
+      "chromeos/change_list_processor.h",
+      "chromeos/directory_loader.cc",
+      "chromeos/directory_loader.h",
+      "chromeos/file_cache.cc",
+      "chromeos/file_cache.h",
+      "chromeos/file_system.cc",
+      "chromeos/file_system.h",
+      "chromeos/file_system/copy_operation.cc",
+      "chromeos/file_system/copy_operation.h",
+      "chromeos/file_system/create_directory_operation.cc",
+      "chromeos/file_system/create_directory_operation.h",
+      "chromeos/file_system/create_file_operation.cc",
+      "chromeos/file_system/create_file_operation.h",
+      "chromeos/file_system/download_operation.cc",
+      "chromeos/file_system/download_operation.h",
+      "chromeos/file_system/get_file_for_saving_operation.cc",
+      "chromeos/file_system/get_file_for_saving_operation.h",
+      "chromeos/file_system/move_operation.cc",
+      "chromeos/file_system/move_operation.h",
+      "chromeos/file_system/open_file_operation.cc",
+      "chromeos/file_system/open_file_operation.h",
+      "chromeos/file_system/operation_delegate.cc",
+      "chromeos/file_system/operation_delegate.h",
+      "chromeos/file_system/remove_operation.cc",
+      "chromeos/file_system/remove_operation.h",
+      "chromeos/file_system/search_operation.cc",
+      "chromeos/file_system/search_operation.h",
+      "chromeos/file_system/set_property_operation.cc",
+      "chromeos/file_system/set_property_operation.h",
+      "chromeos/file_system/touch_operation.cc",
+      "chromeos/file_system/touch_operation.h",
+      "chromeos/file_system/truncate_operation.cc",
+      "chromeos/file_system/truncate_operation.h",
+      "chromeos/file_system_interface.cc",
+      "chromeos/file_system_interface.h",
+      "chromeos/file_system_observer.h",
+      "chromeos/remove_stale_cache_files.cc",
+      "chromeos/remove_stale_cache_files.h",
+      "chromeos/resource_metadata.cc",
+      "chromeos/resource_metadata.h",
+      "chromeos/search_metadata.cc",
+      "chromeos/search_metadata.h",
+      "chromeos/sync/entry_revert_performer.cc",
+      "chromeos/sync/entry_revert_performer.h",
+      "chromeos/sync/entry_update_performer.cc",
+      "chromeos/sync/entry_update_performer.h",
+      "chromeos/sync/remove_performer.cc",
+      "chromeos/sync/remove_performer.h",
+      "chromeos/sync_client.cc",
+      "chromeos/sync_client.h",
+    ]
+    deps = [
+      ":drive",
+      "//base",
+      "//base:i18n",
+      "//components/prefs",
+      "//google_apis:google_apis",
+      "//net:net",
+    ]
+    public_deps = [
+      ":proto",
+    ]
+  }
   static_library("test_support_chromeos") {
     testonly = true
     sources = [
       "chromeos/drive_test_util.cc",
       "chromeos/drive_test_util.h",
       "chromeos/dummy_file_system.cc",
       "chromeos/dummy_file_system.h",
       "chromeos/fake_file_system.cc",
       "chromeos/fake_file_system.h",
       "chromeos/fake_free_disk_space_getter.cc",
       "chromeos/fake_free_disk_space_getter.h",
     ]
     deps = [
       ":drive",
       ":drive_chromeos",
       ":proto",
       "//base",
       "//components/prefs:test_support",
       "//content/test:test_support",
       "//google_apis:test_support",
     ]
   }
 }