DevTools: request app banner from DevTools without #enable-add-to-shelf flag while emulating.

content/public/browser/web_contents_delegate.cc

Index: content/public/browser/web_contents_delegate.cc
diff --git a/content/public/browser/web_contents_delegate.cc b/content/public/browser/web_contents_delegate.cc
index c937d666a687015d78cba7719d0d01ff814e2245..fede9312d4c39b571c9ecf70651520f71c2ecede 100644
--- a/content/public/browser/web_contents_delegate.cc
+++ b/content/public/browser/web_contents_delegate.cc
@@ -258,8 +258,8 @@ void WebContentsDelegate::ShowCertificateViewerInDevTools(
     int cert_id) {
 }
 
-bool WebContentsDelegate::RequestAppBanner(content::WebContents* web_contents) {
-  return false;
+void WebContentsDelegate::RequestAppBannerFromDevTools(
+    content::WebContents* web_contents) {
 }
 
 }  // namespace content