Remove some global UI defines

third_party/WebKit/public/public_features.gni

Index: third_party/WebKit/public/public_features.gni
diff --git a/third_party/WebKit/public/public_features.gni b/third_party/WebKit/public/public_features.gni
index 2eb71d3437aed68710544ef86bf7f3c38d7b6bb9..51bc577d53834d977eaf31b64e58e4b2d7d99b87 100644
--- a/third_party/WebKit/public/public_features.gni
+++ b/third_party/WebKit/public/public_features.gni
@@ -2,6 +2,8 @@
 # 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")
+
 declare_args() {
   # If debug_devtools is set to true, JavaScript files for DevTools are stored
   # as is and loaded from disk. Otherwise, a concatenated file is stored in
@@ -10,5 +12,7 @@ declare_args() {
   debug_devtools = false
 }
 
+use_default_render_theme = use_aura && !is_android
+
 # Use Minikin hyphenation engine.
 use_minikin_hyphenation = is_android