Add some remoting targets to GN build.

ui/wm/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.
 
 component("wm") {
   sources = [
     "core/accelerator_delegate.h",
     "core/accelerator_filter.cc",
     "core/accelerator_filter.h",
     "core/base_focus_rules.cc",
     "core/base_focus_rules.h",
     "core/capture_controller.cc",
     "core/capture_controller.h",
     "core/compound_event_filter.cc",
     "core/compound_event_filter.h",
+    "core/coordinate_conversion.cc",
+    "core/coordinate_conversion.h",
     "core/cursor_manager.cc",
     "core/cursor_manager.h",
     "core/default_activation_client.cc",
     "core/default_activation_client.h",
     "core/easy_resize_window_targeter.cc",
     "core/easy_resize_window_targeter.h",
     "core/focus_controller.cc",
     "core/focus_controller.h",
     "core/focus_rules.h",
     "core/image_grid.cc",
@@ skipping 110 matching lines @@
     "//ui/compositor",
     "//ui/events",
     "//ui/events:events_base",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }
 
 }