Encrypted Media: Implement IPC based SetCdm().

content/renderer/media/crypto/content_decryption_module_factory.cc

 // 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.
 
 #include "content/renderer/media/crypto/content_decryption_module_factory.h"
 
 #include "base/logging.h"
 #include "content/renderer/media/crypto/key_systems.h"
 #include "media/cdm/aes_decryptor.h"
 
@@ skipping 10 matching lines @@
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
 namespace content {
 
 scoped_ptr<media::MediaKeys> ContentDecryptionModuleFactory::Create(
     const std::string& key_system,
 #if defined(ENABLE_PEPPER_CDMS)
     const CreatePepperCdmCB& create_pepper_cdm_cb,
 #elif defined(OS_ANDROID)
     RendererMediaPlayerManager* manager,
-    int cdm_id,
     const GURL& frame_url,
+    int* cdm_id,
 #endif  // defined(ENABLE_PEPPER_CDMS)
     const media::SessionCreatedCB& session_created_cb,
     const media::SessionMessageCB& session_message_cb,
     const media::SessionReadyCB& session_ready_cb,
     const media::SessionClosedCB& session_closed_cb,
     const media::SessionErrorCB& session_error_cb) {
+#if defined(OS_ANDROID)
+    DCHECK_EQ(*cdm_id, RendererMediaPlayerManager::kInvalidCdmId);

[ddorwin, 2014/03/25 23:03:59]

You could move this to 68 and avoid this extra ifdef.

[xhwang, 2014/03/26 06:02:04]

Done.

+#endif  // defined(OS_ANDROID)
   if (CanUseAesDecryptor(key_system)) {
     return scoped_ptr<media::MediaKeys>(
         new media::AesDecryptor(session_created_cb,
                                 session_message_cb,
                                 session_ready_cb,
                                 session_closed_cb,
                                 session_error_cb));
   }
-
 #if defined(ENABLE_PEPPER_CDMS)
   return scoped_ptr<media::MediaKeys>(
       PpapiDecryptor::Create(key_system,
                              create_pepper_cdm_cb,
                              session_created_cb,
                              session_message_cb,
                              session_ready_cb,
                              session_closed_cb,
                              session_error_cb));
 #elif defined(OS_ANDROID)
   scoped_ptr<ProxyMediaKeys> proxy_media_keys(
       new ProxyMediaKeys(manager,
-                         cdm_id,
                          session_created_cb,
                          session_message_cb,
                          session_ready_cb,
                          session_closed_cb,
                          session_error_cb));
   proxy_media_keys->InitializeCdm(key_system, frame_url);
+  *cdm_id = proxy_media_keys->GetCdmId();
   return proxy_media_keys.PassAs<media::MediaKeys>();
 #else
   return scoped_ptr<media::MediaKeys>();
 #endif  // defined(ENABLE_PEPPER_CDMS)
 }
 
 }  // namespace content