media: Add MediaDrmStorage

media/mojo/services/mojo_media_drm_storage.cc

+// 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.
+
+#include "media/mojo/services/mojo_media_drm_storage.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+
+namespace media {
+
+MojoMediaDrmStorage::MojoMediaDrmStorage(
+    mojom::MediaDrmStoragePtr media_drm_storage_ptr)
+    : media_drm_storage_ptr_(std::move(media_drm_storage_ptr)),
+      weak_factory_(this) {
+  DVLOG(1) << __func__;
+}
+
+MojoMediaDrmStorage::~MojoMediaDrmStorage() {}
+
+void MojoMediaDrmStorage::Initialize(const url::Origin& origin) {

[yucliu1, 2017/03/28 18:10:20]

I think all of the MediaDrm codes are using GURL as origin. Should we change the
type there or here?

[xhwang, 2017/03/28 20:57:09]

We have a bug to replace GURL with url::Origin:
https://bugs.chromium.org/p/chromium/issues/detail?id=639438

+  DVLOG(1) << __func__;
+  media_drm_storage_ptr_->Initialize(origin);
+}
+
+void MojoMediaDrmStorage::OnProvisioned(ResultCB result_cb) {
+  DVLOG(1) << __func__;
+  media_drm_storage_ptr_->OnProvisioned(
+      base::Bind(&MojoMediaDrmStorage::OnResult, weak_factory_.GetWeakPtr(),
+                 base::Passed(&result_cb)));
+}
+
+void MojoMediaDrmStorage::SavePersistentSession(
+    const std::string& session_id,
+    const std::vector<uint8_t>& key_set_id,
+    const std::string& mime_type,
+    ResultCB result_cb) {
+  DVLOG(1) << __func__;
+  media_drm_storage_ptr_->SavePersistentSession(
+      session_id, key_set_id, mime_type,
+      base::Bind(&MojoMediaDrmStorage::OnResult, weak_factory_.GetWeakPtr(),
+                 base::Passed(&result_cb)));
+}
+
+void MojoMediaDrmStorage::LoadPersistentSession(
+    const std::string& session_id,
+    LoadPersistentSessionCB load_persistent_session_cb) {
+  DVLOG(1) << __func__;
+  media_drm_storage_ptr_->LoadPersistentSession(
+      session_id, base::Bind(&MojoMediaDrmStorage::OnPersistentSessionLoaded,
+                             weak_factory_.GetWeakPtr(),
+                             base::Passed(&load_persistent_session_cb)));
+}
+
+void MojoMediaDrmStorage::RemovePersistentSession(const std::string& session_id,
+                                                  ResultCB result_cb) {
+  DVLOG(1) << __func__;
+  media_drm_storage_ptr_->RemovePersistentSession(
+      session_id,
+      base::Bind(&MojoMediaDrmStorage::OnResult, weak_factory_.GetWeakPtr(),
+                 base::Passed(&result_cb)));
+}
+
+void MojoMediaDrmStorage::OnResult(ResultCB result_cb, bool success) {
+  DVLOG(1) << __func__ << ": success = " << success;
+  std::move(result_cb).Run(success);

[yucliu1, 2017/03/28 18:10:20]

Just curious, what's the benefit for std::move here?

[xhwang, 2017/03/28 20:57:08]

It's a OnceCallback, you have to "move" it before you can call it.

https://chromium.googlesource.com/chromium/src/+/master/docs/callback.md#

+}
+
+void MojoMediaDrmStorage::OnPersistentSessionLoaded(
+    LoadPersistentSessionCB load_persistent_session_cb,
+    bool success,
+    const std::vector<uint8_t>& key_set_id,
+    const std::string& mime_type) {
+  DVLOG(1) << __func__ << ": success = " << success;
+  DCHECK_EQ(success, !key_set_id.empty());
+  DCHECK_EQ(success, !mime_type.empty());
+
+  std::move(load_persistent_session_cb).Run(success, key_set_id, mime_type);

[dcheng, 2017/03/29 01:17:23]

#include <utility>

+}
+
+}  // namespace media