MD Settings: simplify logic for whether themes can be reset

chrome/browser/ui/webui/settings/appearance_handler.h

Index: chrome/browser/ui/webui/settings/appearance_handler.h
diff --git a/chrome/browser/ui/webui/settings/appearance_handler.h b/chrome/browser/ui/webui/settings/appearance_handler.h
index 86befb661ef1a776bbba9e81ec4e7ded666212db..b5fd8f03d27de79c448318018edb9c85eda2a139 100644
--- a/chrome/browser/ui/webui/settings/appearance_handler.h
+++ b/chrome/browser/ui/webui/settings/appearance_handler.h
@@ -38,8 +38,8 @@ class AppearanceHandler : public SettingsPageUIHandler,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
-  // Queries the enabled state of the reset-theme control.
-  base::FundamentalValue QueryResetThemeEnabledState();
+  // Whether the theme can be reset.
+  bool ResetThemeEnabled() const;
 
   // Resets the UI theme of the browser to the default theme.
   void ResetTheme(const base::ListValue*);