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

ui/native_theme/BUILD.gn

Index: ui/native_theme/BUILD.gn
diff --git a/ui/native_theme/BUILD.gn b/ui/native_theme/BUILD.gn
index 6314939bcdf2eace3bd8b089de5feef45dfd40fa..a64cb968c028e805a8740babc6965e616b9dda5d 100644
--- a/ui/native_theme/BUILD.gn
+++ b/ui/native_theme/BUILD.gn
@@ -15,16 +15,12 @@ component("native_theme") {
     "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) {
@@ -34,13 +30,6 @@ component("native_theme") {
       "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" ]
@@ -64,6 +53,31 @@ component("native_theme") {
   }
 }
 
+if (is_win) {
+  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",
+    ]
+  }
+} else {
+  source_set("native_theme_browser") {
+  }
+}
+
 test("native_theme_unittests") {
   sources = []