MD Settings: fix help/ redirection to only happen on chrome://help

chrome/browser/chrome_content_browser_client.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 310 matching lines @@
                           media::mojom::RemoterRequest request) final;
 #endif  // BUILDFLAG(ENABLE_MEDIA_REMOTING)
 
   std::unique_ptr<base::TaskScheduler::InitParams> GetTaskSchedulerInitParams()
       override;
   base::FilePath GetLoggingFileName() override;
   std::vector<std::unique_ptr<content::URLLoaderThrottle>>
   CreateURLLoaderThrottles(
       const base::Callback<content::WebContents*()>& wc_getter) override;
 
+ protected:
+  static bool HandleWebUI(GURL* url, content::BrowserContext* browser_context);
+  static bool HandleWebUIReverse(GURL* url,
+                                 content::BrowserContext* browser_context);
+
  private:
   friend class DisableWebRtcEncryptionFlagTest;
   friend class InProcessBrowserTest;
 
   // Populate |frame_interfaces_|.
   void InitFrameInterfaces();
 
 #if BUILDFLAG(ENABLE_WEBRTC)
   // Copies disable WebRTC encryption switch depending on the channel.
   static void MaybeCopyDisableWebRtcEncryptionSwitch(
@@ skipping 50 matching lines @@
   std::unique_ptr<
       service_manager::BinderRegistryWithParams<content::RenderFrameHost*>>
       frame_interfaces_parameterized_;
 
   base::WeakPtrFactory<ChromeContentBrowserClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_