Obsolete the ozone code path in ui/views/

ui/views/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")
 import("//ui/ozone/ozone.gni")
 import("//ui/vector_icons/vector_icons.gni")
@@ skipping 617 matching lines @@
       } else if (is_win) {
         sources += [
           "widget/desktop_aura/desktop_drag_drop_client_win.cc",
           "widget/desktop_aura/desktop_drag_drop_client_win.h",
           "widget/desktop_aura/desktop_screen_win.cc",
           "widget/desktop_aura/desktop_screen_win.h",
           "widget/desktop_aura/desktop_window_tree_host_win.cc",
           "widget/desktop_aura/desktop_window_tree_host_win.h",
         ]
       } else if (use_ozone) {
-        sources += [
-          "widget/desktop_aura/desktop_factory_ozone.cc",
-          "widget/desktop_aura/desktop_factory_ozone.h",
-          "widget/desktop_aura/desktop_screen_ozone.cc",
-          "widget/desktop_aura/desktop_window_tree_host_ozone.cc",
-        ]
+        sources += [ "widget/desktop_aura/desktop_window_tree_host_ozone.cc" ]
       }
       if (is_linux) {
         sources += [ "style/platform_style_linux.cc" ]
       }
     }
   }
 
   if (is_mac) {
     deps += [
       "//ui/accelerated_widget_mac",
@@ skipping 423 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }