media: Add MediaDrmStorage

chrome/browser/media/android/cdm/media_drm_storage_factory.h

Index: chrome/browser/media/android/cdm/media_drm_storage_factory.h
diff --git a/chrome/browser/media/android/cdm/media_drm_storage_factory.h b/chrome/browser/media/android/cdm/media_drm_storage_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..423c997e7a407f2960ac9d025b277631c1be933c
--- /dev/null
+++ b/chrome/browser/media/android/cdm/media_drm_storage_factory.h
@@ -0,0 +1,21 @@
+// 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 CHROME_BROWSER_MEDIA_ANDROID_CDM_MEDIA_DRM_STORAGE_FACTORY_H_
+#define CHROME_BROWSER_MEDIA_ANDROID_CDM_MEDIA_DRM_STORAGE_FACTORY_H_
+
+#include "media/mojo/interfaces/media_drm_storage.mojom.h"
+
+namespace content {
+class RenderFrameHost;
+}
+
+namespace chrome {
+
+void CreateMediaDrmStorage(content::RenderFrameHost* render_frame_host,

[liberato (no reviews please), 2017/03/28 16:42:44]

i think that the answer to my question is 'leave it as is'.  however, here's the
discussion that went on in my head.  :)

should this be exposed on RFH directly?  all of the other interfaces are visible
in content/ already.  of course, RFH would need to ask the embedder to provide
the concrete impl.

do we believe that the interfaces in media/ are applicable to any embedder? 
seems like the answer should be 'yes'.

[xhwang, 2017/03/29 20:47:25]

We discussed this offline. The idea of this comment is that we always register
the service at the content layer, then use ContentClient to delegate the
concrete work to the content embedder.

It's totally doable. But currently we already have a lot of layers. Adding this
indirection doesn't seem to bring us any obvious benefits.

So for now I'll leave this as is, but we can always revisit this idea.

+                           media::mojom::MediaDrmStorageRequest request);
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_MEDIA_ANDROID_CDM_MEDIA_DRM_STORAGE_FACTORY_H_