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

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 2c30533198316a366bdaa9c0485bb9fe5b6ee4e3..042cf835a074861c6f6e891465f27e18e6f95eaf 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -92,8 +92,6 @@ static_library("test_support") {
     "../public/test/ppapi_test_utils.h",
     "../public/test/render_view_test.cc",
     "../public/test/render_view_test.h",
-    "../public/test/sandbox_file_system_test_helper.cc",
-    "../public/test/sandbox_file_system_test_helper.h",
     "../public/test/test_browser_context.cc",
     "../public/test/test_browser_context.h",
     "../public/test/test_browser_thread.cc",
@@ -1082,19 +1080,9 @@ test("content_unittests") {
     "../browser/download/parallel_download_utils_unittest.cc",
     "../browser/download/rate_estimator_unittest.cc",
     "../browser/download/save_package_unittest.cc",
-    "../browser/fileapi/copy_or_move_operation_delegate_unittest.cc",
-    "../browser/fileapi/dragged_file_util_unittest.cc",
-    "../browser/fileapi/file_system_context_unittest.cc",
-    "../browser/fileapi/file_system_operation_impl_unittest.cc",
     "../browser/fileapi/file_system_operation_impl_write_unittest.cc",
     "../browser/fileapi/file_system_operation_runner_unittest.cc",
     "../browser/fileapi/fileapi_message_filter_unittest.cc",
-    "../browser/fileapi/mock_file_change_observer.cc",
-    "../browser/fileapi/mock_file_change_observer.h",
-    "../browser/fileapi/mock_file_update_observer.cc",
-    "../browser/fileapi/mock_file_update_observer.h",
-    "../browser/fileapi/obfuscated_file_util_unittest.cc",
-    "../browser/fileapi/recursive_operation_delegate_unittest.cc",
     "../browser/fileapi/sandbox_database_test_helper.cc",
     "../browser/fileapi/sandbox_database_test_helper.h",
     "../browser/fileapi/sandbox_directory_database_unittest.cc",
@@ -1404,8 +1392,6 @@ test("content_unittests") {
     "../renderer/render_widget_unittest.cc",
     "../renderer/scheduler/resource_dispatch_throttler_unittest.cc",
     "../renderer/skia_benchmarking_extension_unittest.cc",
-    "fileapi_test_file_set.cc",
-    "fileapi_test_file_set.h",
     "image_decoder_test.cc",
     "image_decoder_test.h",
     "navigation_simulator_unittest.cc",