Move chrome/browser/chromeos/drive/file_system.cc (+deps) into components/drive.

components/drive/BUILD.gn

Index: components/drive/BUILD.gn
diff --git a/components/drive/BUILD.gn b/components/drive/BUILD.gn
index 45678789b36f7dc4e229a72d788a55819aa2c153..f4596bd93f4cee238d21b708dd476309e9c60579 100644
--- a/components/drive/BUILD.gn
+++ b/components/drive/BUILD.gn
@@ -11,6 +11,8 @@ source_set("drive") {
     "change_list_loader_observer.h",
     "change_list_processor.cc",
     "change_list_processor.h",
+    "directory_loader.cc",
+    "directory_loader.h",
     "drive_api_util.cc",
     "drive_api_util.h",
     "drive_app_registry.cc",
@@ -31,6 +33,8 @@ source_set("drive") {
     "file_change.h",
     "file_errors.cc",
     "file_errors.h",
+    "file_system.cc",
+    "file_system.h",
     "file_system/copy_operation.cc",
     "file_system/copy_operation.h",
     "file_system/create_directory_operation.cc",
@@ -63,6 +67,7 @@ source_set("drive") {
     "file_system_interface.h",
     "file_system_metadata.cc",
     "file_system_metadata.h",
+    "file_system_observer.h",
     "file_write_watcher.cc",
     "file_write_watcher.h",
     "job_list.cc",
@@ -73,16 +78,28 @@ source_set("drive") {
     "job_scheduler.h",
     "local_file_reader.cc",
     "local_file_reader.h",
+    "remove_stale_cache_files.cc",
+    "remove_stale_cache_files.h",
     "resource_entry_conversion.cc",
     "resource_entry_conversion.h",
     "resource_metadata.cc",
     "resource_metadata.h",
     "resource_metadata_storage.cc",
     "resource_metadata_storage.h",
+    "search_metadata.cc",
+    "search_metadata.h",
     "service/drive_api_service.cc",
     "service/drive_api_service.h",
     "service/drive_service_interface.cc",
     "service/drive_service_interface.h",
+    "sync/entry_revert_performer.cc",
+    "sync/entry_revert_performer.h",
+    "sync/entry_update_performer.cc",
+    "sync/entry_update_performer.h",
+    "sync/remove_performer.cc",
+    "sync/remove_performer.h",
+    "sync_client.cc",
+    "sync_client.h",
   ]
   deps = [
     "//base:base",
@@ -113,6 +130,10 @@ source_set("test_support") {
   sources = [
     "drive_test_util.cc",
     "drive_test_util.h",
+    "dummy_file_system.cc",
+    "dummy_file_system.h",
+    "fake_file_system.cc",
+    "fake_file_system.h",
     "fake_free_disk_space_getter.cc",
     "fake_free_disk_space_getter.h",
     "service/dummy_drive_service.cc",