Revert of Content "gn check" work.

content/gpu/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/ui.gni")
 import("//content/content.gni")
 import("//media/media_options.gni")
 
 # See //content/BUILD.gn for how this works.
 group("gpu") {
@@ skipping 24 matching lines @@
     "gpu_watchdog_thread.cc",
     "gpu_watchdog_thread.h",
     "in_process_gpu_thread.cc",
     "in_process_gpu_thread.h",
   ]
 
   configs += [ "//content:content_implementation" ]
 
   deps = [
     "//base",
-    "//base/third_party/dynamic_annotations",
-    "//components/tracing",
     "//content:export",
     "//content/public/child:child_sources",
     "//content/public/common:common_sources",
     "//gpu:gpu",
     "//gpu/ipc/common:command_buffer_traits",
     "//ipc",
-    "//media/mojo/services:application_factory",
     "//mojo/shell/public/interfaces",
     "//skia",
-    "//ui/events/ipc",
-    "//ui/gfx/ipc",
     "//ui/gl",
   ]
 
   public_deps = [
     "//content/common:mojo_bindings",
   ]
 
   if (mojo_media_host == "gpu") {
     deps += [ "//media/mojo/services:application_factory" ]
   }
 
   if (is_win) {
     configs += [
       "//third_party/khronos:khronos_headers",
       "//third_party/wtl:wtl_includes",
     ]
     libs = [ "setupapi.lib" ]
     deps += [
-      "//sandbox",
       "//third_party/angle:libEGL",
       "//third_party/angle:libGLESv2",
     ]
   }
 
   if (is_chromeos && current_cpu != "arm") {
     configs += [ "//third_party/libva:libva_config" ]
   }
 
   if (use_x11) {
     deps += [ "//ui/events/platform/x11" ]
   }
 
-  if (use_ozone) {
-    deps += [ "//ui/ozone" ]
-  }
-
   if (enable_vulkan) {
     deps += [ "//gpu/vulkan" ]
   }
 }