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

ash/BUILD.gn

Index: ash/BUILD.gn
diff --git a/ash/BUILD.gn b/ash/BUILD.gn
index 54901f8ca47d7e863aef8056c9105f43c6af1488..3f4800e32bba8f170eb048dd7326c0136a4bc194 100644
--- a/ash/BUILD.gn
+++ b/ash/BUILD.gn
@@ -81,19 +81,6 @@ component("ash") {
     "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",
@@ -1148,7 +1135,6 @@ source_set("common_unittests") {
     "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",
@@ -1423,6 +1409,7 @@ test("ash_unittests") {
     "//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",