MD Settings: Redirect chrome://chrome to MD About when MD Settings is on

chrome/browser/browser_about_handler.cc

Index: chrome/browser/browser_about_handler.cc
diff --git a/chrome/browser/browser_about_handler.cc b/chrome/browser/browser_about_handler.cc
index 2273e600ec317775bea759d830063d49e94ab6d7..6006a1bf7d6b593b7210183a2f2a29365316a648 100644
--- a/chrome/browser/browser_about_handler.cc
+++ b/chrome/browser/browser_about_handler.cc
@@ -128,6 +128,12 @@ bool WillHandleBrowserAboutURL(GURL* url,
       host = chrome::kChromeUIUberHost;
       path = chrome::kChromeUIHelpHost + url->path();
     }
+  // Redirect chrome://chrome to chrome://settings/help, only for MD settings.
+  } else if (host == chrome::kChromeUIUberHost &&
+             base::FeatureList::IsEnabled(features::kMaterialDesignSettings) &&
+             (url->path().empty() || url->path() == "/")) {
+    host = chrome::kChromeUISettingsHost;
+    path = chrome::kChromeUIHelpHost;
   }
 
   GURL::Replacements replacements;