[MD settings] adding font settings files

chrome/browser/resources/settings/appearance_page/appearance_shared.css

Index: chrome/browser/resources/settings/appearance_page/appearance_shared.css
diff --git a/chrome/browser/resources/settings/appearance_page/appearance_shared.css b/chrome/browser/resources/settings/appearance_page/appearance_shared.css
new file mode 100644
index 0000000000000000000000000000000000000000..d81173da5c42dd0e5028fb79fed39cbeb9c06edd
--- /dev/null
+++ b/chrome/browser/resources/settings/appearance_page/appearance_shared.css
@@ -0,0 +1,12 @@
+/* Copyright 2015 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. */
+
+/*
+ * Keep the slider color consistent throughout the range.
+ */
+paper-slider {
+  --paper-slider-knob-start-border-color: var(--google-blue-700);
+  --paper-slider-knob-start-color: var(--google-blue-700);
+  --paper-slider-pin-start-color: var(--google-blue-700);
+}