chromeos: Remove legacy code for chrome://imageburner

chrome/chrome_browser_chromeos.gypi

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 359 matching lines @@
         'browser/chromeos/first_run/steps/tray_step.h',
         'browser/chromeos/genius_app/app_id.h',
         'browser/chromeos/geolocation/geoposition.cc',
         'browser/chromeos/geolocation/geoposition.h',
         'browser/chromeos/geolocation/simple_geolocation_provider.cc',
         'browser/chromeos/geolocation/simple_geolocation_provider.h',
         'browser/chromeos/geolocation/simple_geolocation_request.cc',
         'browser/chromeos/geolocation/simple_geolocation_request.h',
         'browser/chromeos/idle_detector.cc',
         'browser/chromeos/idle_detector.h',
-        'browser/chromeos/imageburner/burn_controller.cc',
-        'browser/chromeos/imageburner/burn_controller.h',
-        'browser/chromeos/imageburner/burn_device_handler.cc',
-        'browser/chromeos/imageburner/burn_device_handler.h',
-        'browser/chromeos/imageburner/burn_manager.cc',
-        'browser/chromeos/imageburner/burn_manager.h',
         'browser/chromeos/input_method/accessibility.cc',
         'browser/chromeos/input_method/accessibility.h',
         'browser/chromeos/input_method/browser_state_monitor.cc',
         'browser/chromeos/input_method/browser_state_monitor.h',
         'browser/chromeos/input_method/candidate_window_controller.cc',
         'browser/chromeos/input_method/candidate_window_controller.h',
         'browser/chromeos/input_method/candidate_window_controller_impl.cc',
         'browser/chromeos/input_method/candidate_window_controller_impl.h',
         'browser/chromeos/input_method/component_extension_ime_manager_impl.cc',
         'browser/chromeos/input_method/component_extension_ime_manager_impl.h',
@@ skipping 858 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }