Move browser-side File API unittests next to the files they cover.

storage/browser/BUILD.gn

Index: storage/browser/BUILD.gn
diff --git a/storage/browser/BUILD.gn b/storage/browser/BUILD.gn
index e569c8448af425292c7159278b1077a9bfe4f9d8..68537a807bb58220771ea7690e2e1a8973ddbb35 100644
--- a/storage/browser/BUILD.gn
+++ b/storage/browser/BUILD.gn
@@ -238,10 +238,14 @@ test("storage_unittests") {
     "database/database_quota_client_unittest.cc",
     "database/database_util_unittest.cc",
     "database/databases_table_unittest.cc",
+    "fileapi/copy_or_move_operation_delegate_unittest.cc",
     "fileapi/copy_or_move_file_validator_unittest.cc",
+    "fileapi/dragged_file_util_unittest.cc",
     "fileapi/external_mount_points_unittest.cc",
+    "fileapi/file_system_context_unittest.cc",
     "fileapi/file_system_dir_url_request_job_unittest.cc",
     "fileapi/file_system_file_stream_reader_unittest.cc",
+    "fileapi/file_system_operation_impl_unittest.cc",
     "fileapi/file_system_quota_client_unittest.cc",
     "fileapi/file_system_url_request_job_unittest.cc",
     "fileapi/file_system_url_unittest.cc",
@@ -252,6 +256,8 @@ test("storage_unittests") {
     "fileapi/local_file_stream_writer_unittest.cc",
     "fileapi/local_file_util_unittest.cc",
     "fileapi/native_file_util_unittest.cc",
+    "fileapi/obfuscated_file_util_unittest.cc",
+    "fileapi/recursive_operation_delegate_unittest.cc",
     "fileapi/plugin_private_file_system_backend_unittest.cc",
     "fileapi/quota/quota_backend_impl_unittest.cc",
     "fileapi/quota/quota_reservation_manager_unittest.cc",
@@ -287,6 +293,12 @@ static_library("test_support") {
   sources = [
     "test/async_file_test_helper.cc",
     "test/async_file_test_helper.h",
+    "test/fileapi_test_file_set.cc",
+    "test/fileapi_test_file_set.h",
+    "test/mock_file_change_observer.cc",
+    "test/mock_file_change_observer.h",
+    "test/mock_file_update_observer.cc",
+    "test/mock_file_update_observer.h",
     "test/mock_quota_manager.cc",
     "test/mock_quota_manager.h",
     "test/mock_quota_manager_proxy.cc",
@@ -295,6 +307,8 @@ static_library("test_support") {
     "test/mock_special_storage_policy.h",
     "test/mock_storage_client.cc",
     "test/mock_storage_client.h",
+    "test/sandbox_file_system_test_helper.cc",
+    "test/sandbox_file_system_test_helper.h",
     "test/test_file_system_backend.cc",
     "test/test_file_system_backend.h",
     "test/test_file_system_context.cc",