Move a couple of quota unit tests next to the files they cover.

storage/browser/BUILD.gn

 # Copyright 2014 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("//testing/test.gni")
 
 component("browser") {
   output_name = "storage_browser"
   sources = [
     "blob/blob_data_builder.cc",
     "blob/blob_data_builder.h",
@@ skipping 243 matching lines @@
     "fileapi/native_file_util_unittest.cc",
     "fileapi/plugin_private_file_system_backend_unittest.cc",
     "fileapi/quota/quota_backend_impl_unittest.cc",
     "fileapi/quota/quota_reservation_manager_unittest.cc",
     "fileapi/sandbox_file_system_backend_delegate_unittest.cc",
     "fileapi/sandbox_file_system_backend_unittest.cc",
     "fileapi/sandbox_isolated_origin_database_unittest.cc",
     "fileapi/sandbox_prioritized_origin_database_unittest.cc",
     "fileapi/timed_task_helper_unittest.cc",
     "fileapi/transient_file_util_unittest.cc",
+    "quota/quota_database_unittest.cc",
+    "quota/usage_tracker_unittest.cc",
   ]
 
   deps = [
     ":browser",
     ":test_support",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//net:test_support",
     "//sql:test_support",
     "//testing/gtest",
@@ skipping 17 matching lines @@
     "test/test_file_system_options.h",
   ]
 
   deps = [
     ":browser",
     "//base/test:test_support",
     "//net:test_support",
     "//testing/gtest",
   ]
 }