Remove all blimp engine code

blimp/engine/app/blimp_permission_manager.h

-// Copyright 2015 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 BLIMP_ENGINE_APP_BLIMP_PERMISSION_MANAGER_H_
-#define BLIMP_ENGINE_APP_BLIMP_PERMISSION_MANAGER_H_
-
-#include <vector>
-
-#include "base/callback_forward.h"
-#include "base/macros.h"
-#include "content/public/browser/permission_manager.h"
-
-namespace blimp {
-namespace engine {
-
-class BlimpPermissionManager : public content::PermissionManager {
- public:
-  BlimpPermissionManager();
-  ~BlimpPermissionManager() override;
-
-  // content::PermissionManager implementation:
-  int RequestPermission(
-      content::PermissionType permission,
-      content::RenderFrameHost* render_frame_host,
-      const GURL& requesting_origin,
-      bool user_gesture,
-      const base::Callback<void(blink::mojom::PermissionStatus)>& callback)
-      override;
-  int RequestPermissions(
-      const std::vector<content::PermissionType>& permission,
-      content::RenderFrameHost* render_frame_host,
-      const GURL& requesting_origin,
-      bool user_gesture,
-      const base::Callback<
-          void(const std::vector<blink::mojom::PermissionStatus>&)>& callback)
-      override;
-  void CancelPermissionRequest(int request_id) override;
-  void ResetPermission(content::PermissionType permission,
-                       const GURL& requesting_origin,
-                       const GURL& embedding_origin) override;
-  blink::mojom::PermissionStatus GetPermissionStatus(
-      content::PermissionType permission,
-      const GURL& requesting_origin,
-      const GURL& embedding_origin) override;
-  void RegisterPermissionUsage(content::PermissionType permission,
-                               const GURL& requesting_origin,
-                               const GURL& embedding_origin) override;
-  int SubscribePermissionStatusChange(
-      content::PermissionType permission,
-      const GURL& requesting_origin,
-      const GURL& embedding_origin,
-      const base::Callback<void(blink::mojom::PermissionStatus)>& callback)
-      override;
-  void UnsubscribePermissionStatusChange(int subscription_id) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BlimpPermissionManager);
-};
-
-}  // namespace engine
-}  // namespace blimp
-
-#endif  // BLIMP_ENGINE_APP_BLIMP_PERMISSION_MANAGER_H_