Add "Request app banner" context menu in DevTools

content/public/browser/web_contents_delegate.cc

 // 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.
 
 #include "content/public/browser/web_contents_delegate.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "build/build_config.h"
@@ skipping 241 matching lines @@
     WebContents* web_contents,
     SecurityStyleExplanations* security_style_explanations) {
   return content::SECURITY_STYLE_UNKNOWN;
 }
 
 void WebContentsDelegate::ShowCertificateViewerInDevTools(
     WebContents* web_contents,
     int cert_id) {
 }
 
+bool WebContentsDelegate::RequestAppBanner(content::WebContents* web_contents) {
+  return false;
+}
+
 }  // namespace content