media: Make MediaKeys ref-counted.

content/renderer/media/crypto/proxy_media_keys.h

 // Copyright 2014 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_CRYPTO_PROXY_MEDIA_KEYS_H_
 #define CONTENT_RENDERER_MEDIA_CRYPTO_PROXY_MEDIA_KEYS_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 21 matching lines @@
       const GURL& security_origin,
       bool use_hw_secure_codecs,
       RendererCdmManager* manager,
       const media::SessionMessageCB& session_message_cb,
       const media::SessionClosedCB& session_closed_cb,
       const media::LegacySessionErrorCB& legacy_session_error_cb,
       const media::SessionKeysChangeCB& session_keys_change_cb,
       const media::SessionExpirationUpdateCB& session_expiration_update_cb,
       const media::CdmCreatedCB& cdm_created_cb);
 
-  ~ProxyMediaKeys() override;
-
   // MediaKeys implementation.
   void SetServerCertificate(
       const std::vector<uint8_t>& certificate,
       scoped_ptr<media::SimpleCdmPromise> promise) override;
   void CreateSessionAndGenerateRequest(
       SessionType session_type,
       media::EmeInitDataType init_data_type,
       const std::vector<uint8_t>& init_data,
       scoped_ptr<media::NewSessionCdmPromise> promise) override;
   void LoadSession(SessionType session_type,
@@ skipping 38 matching lines @@
 
  private:
   ProxyMediaKeys(
       RendererCdmManager* manager,
       const media::SessionMessageCB& session_message_cb,
       const media::SessionClosedCB& session_closed_cb,
       const media::LegacySessionErrorCB& legacy_session_error_cb,
       const media::SessionKeysChangeCB& session_keys_change_cb,
       const media::SessionExpirationUpdateCB& session_expiration_update_cb);
 
+  ~ProxyMediaKeys() override;
+
   void InitializeCdm(const std::string& key_system,
                      const GURL& security_origin,
                      bool use_hw_secure_codecs,
                      scoped_ptr<media::SimpleCdmPromise> promise);
 
   RendererCdmManager* manager_;
   int cdm_id_;
 
   media::SessionMessageCB session_message_cb_;
   media::SessionClosedCB session_closed_cb_;
   media::LegacySessionErrorCB legacy_session_error_cb_;
   media::SessionKeysChangeCB session_keys_change_cb_;
   media::SessionExpirationUpdateCB session_expiration_update_cb_;
 
   media::CdmPromiseAdapter cdm_promise_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyMediaKeys);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CRYPTO_PROXY_MEDIA_KEYS_H_