media: Add OutputProtectionProxy

chrome/browser/media/output_protection_proxy.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_MEDIA_OUTPUT_PROTECTION_PROXY_H_
+#define CHROME_BROWSER_MEDIA_OUTPUT_PROTECTION_PROXY_H_
+
+#include <stdint.h>
+
+#include "base/memory/weak_ptr.h"
+#include "content/public/browser/browser_thread.h"
+
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/display/output_protection_delegate.h"
+#endif
+
+namespace chrome {
+
+// A class to query output protection status and/or enable output protection.
+//
+// On Chrome OS, operations on the physical displays are delegated to
+// OutputProtectionDelegate. On other platforms, physical displays are not
+// checked.
+//
+// On all platforms, in ProcessQueryStatusResult(), this class checks the
+// network link and adds it to the existing link mask.
+//
+// All methods except constructor should be invoked in UI thread.
+class OutputProtectionProxy {
+ public:
+  typedef base::Callback<void(bool /* success */,
+                              uint32_t /* link_mask */,
+                              uint32_t /* protection_mask*/)>
+      QueryStatusCallback;
+  typedef base::Callback<void(bool /* success */)> EnableProtectionCallback;
+
+  OutputProtectionProxy(int render_process_id, int render_frame_id);
+
+  void QueryStatus(const QueryStatusCallback& callback);
+  void EnableProtection(uint32_t desired_method_mask,
+                        const EnableProtectionCallback& callback);
+
+ private:
+  // Makes sure this class can only be deleted on the UI thread.
+  friend class base::DeleteHelper<OutputProtectionProxy>;
+  friend struct content::BrowserThread::DeleteOnThread<
+      content::BrowserThread::UI>;
+  ~OutputProtectionProxy();
+
+  // Callbacks for QueryStatus(). It also checks the network link and adds it
+  // to the |link_mask|.
+  void ProcessQueryStatusResult(const QueryStatusCallback& callback,
+                                bool success,
+                                uint32_t link_mask,
+                                uint32_t protection_mask);
+
+  // Used to lookup the WebContents associated with the render frame.
+  int render_process_id_;
+  int render_frame_id_;
+
+#if defined(OS_CHROMEOS)
+  chromeos::OutputProtectionDelegate output_protection_delegate_;
+#endif
+
+  base::WeakPtrFactory<OutputProtectionProxy> weak_ptr_factory_;
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_MEDIA_OUTPUT_PROTECTION_PROXY_H_