| // Copyright 2019 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 COMPONENTS_PERFORMANCE_MANAGER_WEB_CONTENTS_PROXY_IMPL_H_ |
| #define COMPONENTS_PERFORMANCE_MANAGER_WEB_CONTENTS_PROXY_IMPL_H_ |
| |
| #include <cstdint> |
| |
| #include "base/macros.h" |
| |
| namespace content { |
| class WebContents; |
| } // namespace content |
| |
| namespace performance_manager { |
| |
| // A WebContentsProxyImpl is used to post messages out of the performance |
| // manager sequence that are bound for a WebContents running on the UI thread. |
| // The object is bound to the UI thread. A WeakPtr<WebContentsProxyImpl> is |
| // effectively equivalent to a WeakPtr<WebContents>. |
| // |
| // This class is opaquely embedded in a WebContentsProxy, which hides the fact |
| // that a weak pointer is being used under the hood. |
| class WebContentsProxyImpl { |
| public: |
| WebContentsProxyImpl(); |
| virtual ~WebContentsProxyImpl(); |
| |
| // Allows resolving this proxy to the underlying WebContents. This must only |
| // be called on the UI thread. |
| virtual content::WebContents* GetWebContents() const = 0; |
| |
| // Returns the ID of the last committed navigation in the main frame of the |
| // web contents. This must only be called on the UI thread. |
| virtual int64_t LastNavigationId() const = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(WebContentsProxyImpl); |
| }; |
| |
| } // namespace performance_manager |
| |
| #endif // COMPONENTS_PERFORMANCE_MANAGER_WEB_CONTENTS_PROXY_IMPL_H_ |