Duplicate -Move DevTools out of ash and turn it to a component.

ash/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 # Historical note: Ash shipped on Windows for a couple years to support
@@ skipping 63 matching lines @@
     "cancel_mode.cc",
     "cancel_mode.h",
     "cast_config_controller.cc",
     "cast_config_controller.h",
     "debug.cc",
     "debug.h",
     "default_accessibility_delegate.cc",
     "default_accessibility_delegate.h",
     "default_wallpaper_delegate.cc",
     "default_wallpaper_delegate.h",
-    "devtools/ash_devtools_css_agent.cc",
-    "devtools/ash_devtools_css_agent.h",
-    "devtools/ash_devtools_dom_agent.cc",
-    "devtools/ash_devtools_dom_agent.h",
-    "devtools/ui_element.cc",
-    "devtools/ui_element.h",
-    "devtools/ui_element_delegate.h",
-    "devtools/view_element.cc",
-    "devtools/view_element.h",
-    "devtools/widget_element.cc",
-    "devtools/widget_element.h",
-    "devtools/window_element.cc",
-    "devtools/window_element.h",
     "display/cursor_window_controller.cc",
     "display/cursor_window_controller.h",
     "display/display_animator.h",
     "display/display_animator_chromeos.cc",
     "display/display_animator_chromeos.h",
     "display/display_color_manager_chromeos.cc",
     "display/display_color_manager_chromeos.h",
     "display/display_configuration_controller.cc",
     "display/display_configuration_controller.h",
     "display/display_error_observer_chromeos.cc",
@@ skipping 1034 matching lines @@
 source_set("common_unittests") {
   testonly = true
   sources = [
     "accelerators/accelerator_commands_unittest.cc",
     "accelerators/accelerator_controller_unittest.cc",
     "accelerators/accelerator_filter_unittest.cc",
     "accelerators/accelerator_table_unittest.cc",
     "accelerators/spoken_feedback_toggler_unittest.cc",
     "ash_touch_exploration_manager_chromeos_unittest.cc",
     "autoclick/autoclick_unittest.cc",
-    "devtools/ash_devtools_unittest.cc",
     "display/display_configuration_controller_unittest.cc",
     "drag_drop/drag_image_view_unittest.cc",
     "first_run/first_run_helper_unittest.cc",
     "focus_cycler_unittest.cc",
     "frame/caption_buttons/frame_caption_button_container_view_unittest.cc",
     "frame/caption_buttons/frame_size_button_unittest.cc",
     "frame/custom_frame_view_ash_unittest.cc",
     "frame/default_header_painter_unittest.cc",
     "laser/laser_pointer_controller_unittest.cc",
     "laser/laser_pointer_points_unittest.cc",
@@ skipping 254 matching lines @@
     "//ash/resources/vector_icons",
     "//ash/strings",
     "//ash/test:test_support_without_content",
     "//ash/touch_hud",
     "//base",
     "//base/test:test_support",
     "//chromeos",
     "//chromeos:test_support_without_gmock",
     "//components/quirks",
     "//components/signin/core/account_id",
+    "//components/ui_devtools:devtool_unittests",
     "//components/user_manager",
     "//device/bluetooth",
     "//mojo/edk/system",
     "//net:net",
     "//services/ui/public/interfaces",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/icu",
     "//ui/accessibility",
@@ skipping 62 matching lines @@
     "//content/public/app:both",
     "//device/bluetooth",
   ]
 
   data_deps = [
     "//ash/strings:ash_test_strings",
     "//ash/resources:ash_test_resources_with_content_100_percent",
     "//ash/resources:ash_test_resources_200_percent",
   ]
 }