Connect WebMediaPlayerImpl to WebContentDecryptionModuleImpl for EME WD (Chromium side)

content/renderer/media/webcontentdecryptionmodule_impl.h

 // Copyright 2013 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 CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "third_party/WebKit/public/platform/WebContentDecryptionModule.h"
 
 namespace media {
+class Decryptor;
 class MediaKeys;
 }
 
 namespace content {
 
 class WebContentDecryptionModuleSessionImpl;
 class SessionIdAdapter;
 
 class WebContentDecryptionModuleImpl
     : public blink::WebContentDecryptionModule {
  public:
   static WebContentDecryptionModuleImpl* Create(
       const base::string16& key_system);
 
   virtual ~WebContentDecryptionModuleImpl();
 
+  // Returns the Decryptor associated with this CDM. May be NULL if no
+  // Decryptor associated with the MediaKeys object.
+  // TODO(jrummell): Figure out lifetimes, as WMPI may still use the decryptor
+  // after WebContentDecryptionModule is freed. http://crbug.com/330324
+  media::Decryptor* GetDecryptor();
+
   // blink::WebContentDecryptionModule implementation.
   virtual blink::WebContentDecryptionModuleSession* createSession(
       blink::WebContentDecryptionModuleSession::Client* client);
 
  private:
   // Takes ownership of |media_keys| and |adapter|.
   WebContentDecryptionModuleImpl(scoped_ptr<media::MediaKeys> media_keys,
                                  scoped_ptr<SessionIdAdapter> adapter);
 
   // Called when a WebContentDecryptionModuleSessionImpl is closed.
   void OnSessionClosed(uint32 session_id);
 
   scoped_ptr<media::MediaKeys> media_keys_;
   scoped_ptr<SessionIdAdapter> adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleImpl);
 };
 
+// Allow typecasting from blink type as this is the only implementation.
+inline WebContentDecryptionModuleImpl* ToWebContentDecryptionModuleImpl(
+    blink::WebContentDecryptionModule* cdm) {
+  return static_cast<WebContentDecryptionModuleImpl*>(cdm);
+}
+
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_