Remove AshPanelContents

chrome/browser/extensions/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("//chrome/common/features.gni")
 import("//extensions/features/features.gni")
 import("//media/media_options.gni")
 import("//rlz/features/features.gni")
@@ skipping 1133 matching lines @@
   } else {
     sources +=
         [ "api/webrtc_logging_private/webrtc_logging_private_api_stub.cc" ]
   }
 
   if (toolkit_views) {
     deps += [ "//ui/views" ]
   }
 
   if (use_ash) {
-    sources += [
-      "api/tabs/ash_panel_contents.cc",
-      "api/tabs/ash_panel_contents.h",
-    ]
     deps += [
       "//ash",
       "//ash/public/cpp:ash_public_cpp",
     ]
   }
 
   if (use_aura) {
     deps += [
       "//ui/aura",
       "//ui/keyboard",
       "//ui/keyboard:keyboard_with_content",
       "//ui/keyboard:resources",
     ]
   }
 
   if (use_brlapi) {
     sources += [
       "api/braille_display_private/braille_controller_brlapi.cc",
       "api/braille_display_private/brlapi_connection.cc",
       "api/braille_display_private/brlapi_connection.h",
       "api/braille_display_private/brlapi_keycode_map.cc",
       "api/braille_display_private/brlapi_keycode_map.h",
     ]
     deps += [ "//build/linux/libbrlapi" ]
   } else {
     sources += [ "api/braille_display_private/braille_controller_stub.cc" ]
   }
 }