Remove SoftwareOutputDeviceMus.

content/browser/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("//content/browser/browser.gni")
 import("//media/media_options.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
@@ skipping 367 matching lines @@
       "//services/ui/public/cpp",
       "//services/ui/public/interfaces",
       "//ui/aura",
       "//ui/aura_extra",
       "//ui/strings",
       "//ui/wm",
     ]
     sources += [
       "compositor/mus_browser_compositor_output_surface.cc",
       "compositor/mus_browser_compositor_output_surface.h",
-      "compositor/software_output_device_mus.cc",
-      "compositor/software_output_device_mus.h",
       "renderer_host/render_widget_host_view_mus.cc",
       "renderer_host/render_widget_host_view_mus.h",
       "web_contents/web_contents_view_mus.cc",
       "web_contents/web_contents_view_mus.h",
     ]
   } else {  # Not aura.
     sources -= [
       "media/capture/cursor_renderer_aura.cc",
       "media/capture/cursor_renderer_aura.h",
       "media/capture/window_activity_tracker_aura.cc",
@@ skipping 110 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }