refactor: rename the atom directory to shell

shell/browser/font_defaults.h

@@ -0,0 +1,18 @@
+// Copyright (c) 2018 Slack Technologies, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_FONT_DEFAULTS_H_
+#define ATOM_BROWSER_FONT_DEFAULTS_H_
+
+namespace content {
+struct WebPreferences;
+}  // namespace content
+
+namespace atom {
+
+void SetFontDefaults(content::WebPreferences* prefs);
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_FONT_DEFAULTS_H_