Implement a runtime headless mode for Linux

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("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
@@ skipping 157 matching lines @@
               "lib/browser/headless_devtools_manager_delegate.cc",
               "lib/browser/headless_devtools_manager_delegate.h",
               "lib/browser/headless_screen.cc",
               "lib/browser/headless_screen.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_parenting_client.cc",
               "lib/browser/headless_window_parenting_client.h",
+              "lib/browser/headless_window_tree_host.cc",
+              "lib/browser/headless_window_tree_host.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",
               "lib/utility/headless_content_utility_client.cc",
               "lib/utility/headless_content_utility_client.h",
               "public/headless_browser.cc",
               "public/headless_browser.h",
@@ skipping 49 matching lines @@
     "//content/public/common:service_names",
     "//content/public/renderer",
     "//content/public/utility",
     "//net",
     "//services/service_manager/public/cpp",
     "//third_party/mesa:osmesa",
     "//ui/aura",
     "//ui/base",
     "//ui/compositor",
     "//ui/display",
-    "//ui/ozone",
+    "//ui/events/devices",
     "//url",
   ]
 
+  if (use_ozone) {
+    deps += [ "//ui/ozone" ]
+  }
+
   configs += [ ":headless_implementation" ]
 }
 
 group("headless_tests") {
   testonly = true
 
   deps = [
     ":headless_browsertests",
     ":headless_unittests",
   ]
@@ skipping 100 matching lines @@
 
 executable("headless_shell") {
   sources = [
     "app/headless_shell_main.cc",
   ]
 
   deps = [
     "//headless:headless_shell_lib",
   ]
 }