Add "Request app banner" context menu in DevTools

chrome/browser/android/tab_web_contents_delegate_android.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_ANDROID_TAB_WEB_CONTENTS_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_WEB_CONTENTS_DELEGATE_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/files/file_path.h"
@@ skipping 69 matching lines @@
   content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) override;
   bool ShouldResumeRequestsForCreatedWindow() override;
   void AddNewContents(content::WebContents* source,
                       content::WebContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_rect,
                       bool user_gesture,
                       bool* was_blocked) override;
+  bool RequestAppBanner(content::WebContents* web_contents) override;
 
  private:
   // NotificationObserver implementation.
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   void OnFindResultAvailable(content::WebContents* web_contents,
                              const FindNotificationDetails* find_result);
 
   content::NotificationRegistrar notification_registrar_;
 };
 
 // Register the native methods through JNI.
 bool RegisterTabWebContentsDelegateAndroid(JNIEnv* env);
 
 }  // namespace android
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_WEB_CONTENTS_DELEGATE_ANDROID_H_