Add "Request app banner" context menu in DevTools

content/public/browser/web_contents_delegate.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 CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 505 matching lines @@
 
   // Displays platform-specific (OS) dialog with the certificate details.
   virtual void ShowCertificateViewerInDevTools(
       WebContents* web_contents,
       int cert_id);
 
   // Called when the active render widget is forwarding a RemoteChannel
   // compositor proto.  This is used in Blimp mode.
   virtual void ForwardCompositorProto(const std::vector<uint8_t>& proto) {}
 
+  // Requests the app banner. This method is called from the DevTools.
+  virtual bool RequestAppBanner(content::WebContents* web_contents);
+
  protected:
   virtual ~WebContentsDelegate();
 
  private:
   friend class WebContentsImpl;
 
   // Called when |this| becomes the WebContentsDelegate for |source|.
   void Attach(WebContents* source);
 
   // Called when |this| is no longer the WebContentsDelegate for |source|.
   void Detach(WebContents* source);
 
   // The WebContents that this is currently a delegate for.
   std::set<WebContents*> attached_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_