media: Add MediaDrmStorage

components/cdm/browser/media_drm_storage_impl.h

+// Copyright 2017 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_CDM_BROWSER_MEDIA_DRM_STORAGE_IMPL_H_
+#define COMPONENTS_CDM_BROWSER_MEDIA_DRM_STORAGE_IMPL_H_
+
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "media/mojo/interfaces/media_drm_storage.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "url/origin.h"
+
+class PrefRegistrySimple;
+class PrefService;
+
+namespace content {
+class RenderFrameHost;
+}
+
+namespace cdm {
+
+// Implements media::mojom::MediaDrmStorage using PrefService.
+// This file is located under components/ so that it can be shared by multiple
+// content embedders (e.g. chrome and chromecast).
+class MediaDrmStorageImpl final : public media::mojom::MediaDrmStorage,
+                                  public content::WebContentsObserver {
+ public:
+  static void RegisterProfilePrefs(PrefRegistrySimple* registry);
+
+  MediaDrmStorageImpl(content::RenderFrameHost* render_frame_host,
+                      PrefService* pref_service,
+                      const url::Origin& origin,
+                      media::mojom::MediaDrmStorageRequest request);
+  ~MediaDrmStorageImpl() final;
+
+  // media::mojom::MediaDrmStorage implementation.
+  void Initialize(const url::Origin& origin) final;
+  void OnProvisioned(const OnProvisionedCallback& callback) final;
+  void SavePersistentSession(
+      const std::string& session_id,
+      media::mojom::SessionDataPtr session_data,
+      const SavePersistentSessionCallback& callback) final;
+  void LoadPersistentSession(
+      const std::string& session_id,
+      const LoadPersistentSessionCallback& callback) final;
+  void RemovePersistentSession(
+      const std::string& session_id,
+      const RemovePersistentSessionCallback& callback) final;
+
+  // content::WebContentsObserver implementation.
+  void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) final;
+  void DidFinishNavigation(content::NavigationHandle* navigation_handle) final;
+
+ private:
+  // Stops observing WebContents and delete |this|.
+  void Close();
+
+  content::RenderFrameHost* const render_frame_host_ = nullptr;
+  PrefService* const pref_service_ = nullptr;
+  const url::Origin origin_;
+  bool initialized_ = false;
+
+  mojo::Binding<media::mojom::MediaDrmStorage> binding_;
+};
+
+}  // namespace cdm
+
+#endif  // COMPONENTS_CDM_BROWSER_MEDIA_DRM_STORAGE_IMPL_H_