Aura overlay scrollbars adjust color for dark backgrounds

third_party/WebKit/public/platform/WebScrollbarOverlayColorTheme.h

Index: third_party/WebKit/public/platform/WebScrollbarOverlayColorTheme.h
diff --git a/third_party/WebKit/public/platform/WebScrollbarOverlayColorTheme.h b/third_party/WebKit/public/platform/WebScrollbarOverlayColorTheme.h
new file mode 100644
index 0000000000000000000000000000000000000000..453b9a4c57c06e0ff24d72233f54b28c08def84a
--- /dev/null
+++ b/third_party/WebKit/public/platform/WebScrollbarOverlayColorTheme.h
@@ -0,0 +1,15 @@
+// Copyright 2016 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.
+
+#ifndef WebScrollbarOverlayColorTheme_h
+#define WebScrollbarOverlayColorTheme_h
+
+namespace blink {
+enum WebScrollbarOverlayColorTheme {
+  WebScrollbarOverlayColorThemeDark,
+  WebScrollbarOverlayColorThemeLight
+};
+}  // namespace blink
+
+#endif  // WebScrollbarOverlayColorTheme_h