Revert of gn: Remove unnecessary v8 defaults

content/test/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("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
+import("//build_overrides/v8.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
-import("//v8/gni/v8.gni")
 
 content_tests_gypi_values =
     exec_script("//build/gypi_to_gn.py",
                 [
                   rebase_path("../content_tests.gypi"),
                   "--replace=<(SHARED_INTERMEDIATE_DIR)=$root_gen_dir",
                 ],
                 "scope",
                 [ "../content_tests.gypi" ])
 
@@ skipping 889 matching lines @@
     "renderer_fuzzer.cc",
   ]
   deps = [
     ":test_support",
     "//content/renderer:for_content_tests",
     "//content/shell:content_shell_lib",
     "//gin",
   ]
   dict = "data/fuzzer_dictionaries/renderer_fuzzer.dict"
 }