Remove redundant chromeos checks from GN build.

ui/display/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("//testing/test.gni")
 
 if (is_chromeos) {
   component("display") {
     sources = [
@@ skipping 24 matching lines @@
       "chromeos/x11/native_display_event_dispatcher_x11.h",
       "display_export.h",
       "display_switches.cc",
       "display_switches.h",
     ]
 
     defines = [ "DISPLAY_IMPLEMENTATION" ]
 
     deps = [
       "//base",
+      "//ui/display/types",
       "//ui/display/util",
       "//ui/gfx",
       "//ui/gfx/geometry",
     ]
 
     if (use_x11) {
+      sources -= [ "chromeos/ozone/display_configurator_ozone.cc" ]
       configs += [
         "//build/config/linux:x11",
         "//build/config/linux:xext",
         "//build/config/linux:xi",
         "//build/config/linux:xrandr",
       ]
       deps += [ "//ui/events/platform" ]
-      if (is_chromeos) {
-        sources -= [ "chromeos/ozone/display_configurator_ozone.cc" ]
-      }
     }
 
-    if (is_chromeos) {
-      deps += [ "//ui/display/types" ]
-      if (use_x11) {
-        deps += [ "//ui/gfx/x" ]
-      }
+    deps += []
+    if (use_x11) {
+      deps += [ "//ui/gfx/x" ]
     }
 
     if (use_ozone) {
       deps += [ "//ui/ozone" ]
-      if (is_chromeos) {
-        sources -= [
-          "chromeos/x11/display_configurator_x11.cc",
-          "chromeos/x11/display_mode_x11.cc",
-          "chromeos/x11/display_mode_x11.h",
-          "chromeos/x11/display_snapshot_x11.cc",
-          "chromeos/x11/display_snapshot_x11.h",
-          "chromeos/x11/display_util_x11.cc",
-          "chromeos/x11/display_util_x11.h",
-          "chromeos/x11/native_display_delegate_x11.cc",
-          "chromeos/x11/native_display_delegate_x11.h",
-          "chromeos/x11/native_display_event_dispatcher_x11.cc",
-          "chromeos/x11/native_display_event_dispatcher_x11.h",
-        ]
-      }
+      sources -= [
+        "chromeos/x11/display_configurator_x11.cc",
+        "chromeos/x11/display_mode_x11.cc",
+        "chromeos/x11/display_mode_x11.h",
+        "chromeos/x11/display_snapshot_x11.cc",
+        "chromeos/x11/display_snapshot_x11.h",
+        "chromeos/x11/display_util_x11.cc",
+        "chromeos/x11/display_util_x11.h",
+        "chromeos/x11/native_display_delegate_x11.cc",
+        "chromeos/x11/native_display_delegate_x11.h",
+        "chromeos/x11/native_display_event_dispatcher_x11.cc",
+        "chromeos/x11/native_display_event_dispatcher_x11.h",
+      ]
     }
   }
 
   component("test_util") {
     output_name = "display_test_util"
     sources = [
       "chromeos/test/test_display_snapshot.cc",
       "chromeos/test/test_display_snapshot.h",
     ]
 
     defines = [ "DISPLAY_IMPLEMENTATION" ]
 
     public_deps = [
       ":display",
     ]
     deps = [
       "//base",
+      "//ui/display/types",
       "//ui/gfx",
       "//ui/gfx/geometry",
     ]
-
-    if (is_chromeos) {
-      deps += [ "//ui/display/types" ]
-    }
   }
 
   source_set("test_support") {
     testonly = true
     sources = [
       "chromeos/test/action_logger.cc",
       "chromeos/test/action_logger.h",
       "chromeos/test/action_logger_util.cc",
       "chromeos/test/action_logger_util.h",
       "chromeos/test/test_display_layout_manager.cc",
@@ skipping 47 matching lines @@
     ]
   }
 
   if (use_ozone && is_chromeos) {
     sources -= [
       "chromeos/x11/display_util_x11_unittest.cc",
       "chromeos/x11/native_display_event_dispatcher_x11_unittest.cc",
     ]
   }
 }