(Re-)introduce AncestorThrottle to handle 'X-Frame-Options'.

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("//mojo/public/tools/bindings/mojom.gni")
@@ skipping 1039 matching lines @@
     "../browser/fileapi/sandbox_database_test_helper.h",
     "../browser/fileapi/sandbox_directory_database_unittest.cc",
     "../browser/fileapi/sandbox_file_system_backend_delegate_unittest.cc",
     "../browser/fileapi/sandbox_file_system_backend_unittest.cc",
     "../browser/fileapi/sandbox_isolated_origin_database_unittest.cc",
     "../browser/fileapi/sandbox_origin_database_unittest.cc",
     "../browser/fileapi/sandbox_prioritized_origin_database_unittest.cc",
     "../browser/fileapi/timed_task_helper_unittest.cc",
     "../browser/fileapi/transient_file_util_unittest.cc",
     "../browser/fileapi/upload_file_system_file_element_reader_unittest.cc",
+    "../browser/frame_host/ancestor_throttle_unittest.cc",
     "../browser/frame_host/frame_tree_node_blame_context_unittest.cc",
     "../browser/frame_host/frame_tree_unittest.cc",
     "../browser/frame_host/navigation_controller_impl_unittest.cc",
     "../browser/frame_host/navigation_entry_impl_unittest.cc",
     "../browser/frame_host/navigation_handle_impl_unittest.cc",
     "../browser/frame_host/navigator_impl_unittest.cc",
     "../browser/frame_host/render_frame_host_manager_unittest.cc",
     "../browser/frame_host/render_widget_host_view_child_frame_unittest.cc",
     "../browser/frame_host/render_widget_host_view_guest_unittest.cc",
     "../browser/gamepad/gamepad_service_test_helpers.cc",
@@ skipping 643 matching lines @@
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
 group("fuzzers") {
   deps = [
     "//content/test/fuzzer",
   ]
 }