Make PermissionRequestManager::requests_ correspond to the active prompt

chrome/browser/permissions/permission_prompt_android.h

 // Copyright 2016 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_PERMISSIONS_PERMISSION_PROMPT_ANDROID_H_
 #define CHROME_BROWSER_PERMISSIONS_PERMISSION_PROMPT_ANDROID_H_
 
 #include <vector>
 
 #include "base/strings/string16.h"
@@ skipping 11 matching lines @@
   explicit PermissionPromptAndroid(content::WebContents* web_contents);
   ~PermissionPromptAndroid() override;
 
   // PermissionPrompt:
   void SetDelegate(Delegate* delegate) override;
   void Show(const std::vector<PermissionRequest*>& requests,
             const std::vector<bool>& accept_state) override;
   bool CanAcceptRequestUpdate() override;
   bool HidesAutomatically() override;
   void Hide() override;
-  bool IsVisible() override;
   void UpdateAnchorPosition() override;
   gfx::NativeWindow GetNativeWindow() override;
 
   void Closing();
   void ToggleAccept(int index, bool value);
   void Accept();
   void Deny();
 
   size_t permission_count() const { return requests_.size(); }
   ContentSettingsType GetContentSettingType(size_t position) const;
   int GetIconIdForPermission(size_t position) const;
   base::string16 GetMessageTextFragment(size_t position) const;
 
  private:
   // PermissionPromptAndroid is owned by PermissionRequestManager, so it should
   // be safe to hold a raw WebContents pointer here because this class is
   // destroyed before the WebContents.
   content::WebContents* web_contents_;
   // |delegate_| is the PermissionRequestManager, which owns this object.
   Delegate* delegate_;
   // The current request being displayed (if any).
   std::vector<PermissionRequest*> requests_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionPromptAndroid);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_PROMPT_ANDROID_H_