Partial revert of https://codereview.chromium.org/1911973002/

ui/native_theme/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")
 
 component("native_theme") {
   sources = [
     "common_theme.cc",
     "common_theme.h",
     "native_theme.cc",
     "native_theme.h",
     "native_theme_android.cc",
     "native_theme_android.h",
     "native_theme_base.cc",
     "native_theme_base.h",
-    "native_theme_dark_win.cc",
-    "native_theme_dark_win.h",
     "native_theme_mac.h",
     "native_theme_mac.mm",
     "native_theme_observer.cc",
     "native_theme_observer.h",
     "native_theme_switches.cc",
     "native_theme_switches.h",
-    "native_theme_win.cc",
-    "native_theme_win.h",
   ]
 
   if (use_aura) {
     sources += [
       "native_theme_aura.cc",
       "native_theme_aura.h",
       "native_theme_dark_aura.cc",
       "native_theme_dark_aura.h",
     ]
-
-    if (is_win) {
-      sources += [
-        "native_theme_aurawin.cc",
-        "native_theme_aurawin.h",
-      ]
-    }
   }
 
   defines = [ "NATIVE_THEME_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//skia",
     "//ui/base",
     "//ui/display",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/resources",
   ]
 
   if (is_mac) {
     libs = [
       "CoreGraphics.framework",
       "AppKit.framework",
     ]
   }
 }
 
+component("native_theme_browser") {
+  defines = [ "NATIVE_THEME_IMPLEMENTATION" ]
+
+  # These files cannot work in the renderer on Windows.
+  sources = [
+    "native_theme_dark_win.cc",
+    "native_theme_dark_win.h",
+    "native_theme_win.cc",
+    "native_theme_win.h",
+  ]
+
+  deps = [
+    ":native_theme",
+    "//base",
+    "//ui/base",
+    "//ui/display",
+    "//ui/gfx",
+  ]
+}
+
 test("native_theme_unittests") {
   sources = []
 
   if (use_aura) {
     sources += [ "native_theme_aura_unittest.cc" ]
   }
 
   if (is_mac) {
     sources += [ "native_theme_mac_unittest.cc" ]
   }
 
   deps = [
     ":native_theme",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//skia:skia",
     "//testing/gtest",
     "//ui/base",
     "//ui/gfx/geometry:geometry",
   ]
 }