Remove non-existing headers from the build

headless/BUILD.gn

 # Copyright 2015 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("//headless/headless.gni")
 import("//build/util/process_version.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//printing/features/features.gni")
 import("//testing/test.gni")
@@ skipping 205 matching lines @@
               "lib/browser/headless_browser_main_parts.cc",
               "lib/browser/headless_browser_main_parts.h",
               "lib/browser/headless_content_browser_client.cc",
               "lib/browser/headless_content_browser_client.h",
               "lib/browser/headless_devtools.cc",
               "lib/browser/headless_devtools.h",
               "lib/browser/headless_devtools_client_impl.cc",
               "lib/browser/headless_devtools_client_impl.h",
               "lib/browser/headless_devtools_manager_delegate.cc",
               "lib/browser/headless_devtools_manager_delegate.h",
-              "lib/browser/headless_macros.h",
               "lib/browser/headless_net_log.cc",
               "lib/browser/headless_net_log.h",
               "lib/browser/headless_network_delegate.cc",
               "lib/browser/headless_network_delegate.h",
               "lib/browser/headless_permission_manager.cc",
               "lib/browser/headless_permission_manager.h",
               "lib/browser/headless_platform_event_source.cc",
               "lib/browser/headless_platform_event_source.h",
               "lib/browser/headless_shell_application_mac.mm",
               "lib/browser/headless_shell_application_mac.h",
               "lib/browser/headless_tab_socket_impl.cc",
               "lib/browser/headless_tab_socket_impl.h",
               "lib/browser/headless_url_request_context_getter.cc",
               "lib/browser/headless_url_request_context_getter.h",
               "lib/browser/headless_web_contents_impl.cc",
               "lib/browser/headless_web_contents_impl.h",
               "lib/browser/headless_window_tree_host.h",
               "lib/headless_crash_reporter_client.cc",
               "lib/headless_crash_reporter_client.h",
               "lib/headless_content_client.cc",
               "lib/headless_content_client.h",
               "lib/headless_content_main_delegate.cc",
               "lib/headless_content_main_delegate.h",
               "lib/renderer/headless_content_renderer_client.cc",
               "lib/renderer/headless_content_renderer_client.h",
               "public/headless_browser.cc",
               "public/headless_browser.h",
               "public/headless_browser_context.h",
               "public/headless_devtools_client.h",
-              "public/headless_devtools_host.h",
               "public/headless_devtools_target.h",
               "public/headless_export.h",
               "public/headless_web_contents.h",
               "public/internal/message_dispatcher.h",
               "public/internal/value_conversions.h",
               "public/util/black_hole_protocol_handler.cc",
               "public/util/black_hole_protocol_handler.h",
               "public/util/deterministic_dispatcher.cc",
               "public/util/deterministic_dispatcher.h",
               "public/util/deterministic_http_protocol_handler.cc",
@@ skipping 279 matching lines @@
 
 executable("headless_example") {
   sources = [
     "app/headless_example.cc",
   ]
 
   deps = [
     "//headless:headless_shell_lib",
   ]
 }