Introduce CdmContext interface.

content/renderer/media/crypto/ppapi_decryptor.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/ppapi_decryptor.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 177 matching lines @@
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
 
   if (!CdmDelegate()) {
     promise->reject(INVALID_STATE_ERROR, 0, "CdmDelegate() does not exist.");
     return;
   }
 
   CdmDelegate()->GetUsableKeyIds(web_session_id, promise.Pass());
 }
 
+media::CdmContext* PpapiDecryptor::GetCdmContext() {
+  return this;
+}
+
 media::Decryptor* PpapiDecryptor::GetDecryptor() {
   return this;
 }
 
 void PpapiDecryptor::RegisterNewKeyCB(StreamType stream_type,
                                       const NewKeyCB& new_key_cb) {
   if (!render_loop_proxy_->BelongsToCurrentThread()) {
     render_loop_proxy_->PostTask(FROM_HERE,
                                  base::Bind(&PpapiDecryptor::RegisterNewKeyCB,
                                             weak_ptr_factory_.GetWeakPtr(),
@@ skipping 249 matching lines @@
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
   pepper_cdm_wrapper_.reset();
 }
 
 ContentDecryptorDelegate* PpapiDecryptor::CdmDelegate() {
   DCHECK(render_loop_proxy_->BelongsToCurrentThread());
   return (pepper_cdm_wrapper_) ? pepper_cdm_wrapper_->GetCdmDelegate() : NULL;
 }
 
 }  // namespace content