Remove OwnedInterface

content/public/browser/owned_interface.h

-// Copyright (c) 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 CONTENT_BROWSER_OWNED_INTERFACE_H_
-#define CONTENT_BROWSER_OWNED_INTERFACE_H_
-
-#include <memory>
-
-#include "base/memory/ptr_util.h"
-#include "base/memory/ref_counted.h"
-
-namespace content {
-
-// Common base class for interface impls, allowing them to be stored in a
-// type-erased container for ownership management.
-class OwnedInterface {
- public:
-  OwnedInterface() = default;
-  virtual ~OwnedInterface() = default;
-};
-
-template <typename InterfaceImpl>
-class DeleteOnTaskRunner {
- public:
-  DeleteOnTaskRunner(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner = nullptr)
-      : task_runner_(task_runner) {}
-  void operator()(const InterfaceImpl* impl) {
-    if (task_runner_) {
-      if (!task_runner_->DeleteSoon(FROM_HERE, impl)) {
-#if defined(UNIT_TEST)
-        // Only logged under unit testing because leaks at shutdown
-        // are acceptable under normal circumstances.
-        LOG(ERROR) << "DeleteSoon failed on thread";
-#endif  // UNIT_TEST
-      }
-    } else {
-      delete impl;
-    }
-  }
-  ~DeleteOnTaskRunner() = default;
-
- private:
-  const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-};
-
-template <typename InterfaceImpl>
-class OwnedInterfaceImpl : public OwnedInterface {
- public:
-  OwnedInterfaceImpl(
-      std::unique_ptr<InterfaceImpl> impl,
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner = nullptr)
-      : impl_(impl.release(), DeleteOnTaskRunner<InterfaceImpl>(task_runner)) {}
-
-  ~OwnedInterfaceImpl() = default;
-
-  // The returned pointer is owned by this object, which must outlive it.
-  InterfaceImpl* get() { return impl_.get(); }
-
- private:
-  std::unique_ptr<InterfaceImpl, DeleteOnTaskRunner<InterfaceImpl>> impl_;
-
-  DISALLOW_COPY_AND_ASSIGN(OwnedInterfaceImpl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_OWNED_INTERFACE_H_