Convert between |init_data_type| and content type.

content/renderer/media/crypto/proxy_media_keys.cc

 // 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.
 
 #include "content/renderer/media/crypto/proxy_media_keys.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 39 matching lines @@
 
 void ProxyMediaKeys::CreateSession(
     const std::string& init_data_type,
     const uint8* init_data,
     int init_data_length,
     SessionType session_type,
     scoped_ptr<media::NewSessionCdmPromise> promise) {
   // TODO(xhwang): Move these checks up to blink and DCHECK here.
   // See http://crbug.com/342510
   CdmHostMsg_CreateSession_ContentType create_session_content_type;
-  if (init_data_type == "audio/mp4" || init_data_type == "video/mp4") {
+  if (init_data_type == "cenc") {
     create_session_content_type = CREATE_SESSION_TYPE_MP4;
-  } else if (init_data_type == "audio/webm" || init_data_type == "video/webm") {
+  } else if (init_data_type == "webm") {
     create_session_content_type = CREATE_SESSION_TYPE_WEBM;
   } else {
     DLOG(ERROR) << "Unsupported EME CreateSession content type of "
                 << init_data_type;
     promise->reject(
         NOT_SUPPORTED_ERROR,
         0,
         "Unsupported EME CreateSession init data type of " + init_data_type);
     return;
   }
@@ skipping 191 matching lines @@
 
 scoped_ptr<media::CdmPromise> ProxyMediaKeys::TakePromise(uint32_t session_id) {
   PromiseMap::iterator it = session_id_to_promise_map_.find(session_id);
   // May not be a promise associated with this session for asynchronous events.
   if (it == session_id_to_promise_map_.end())
     return scoped_ptr<media::CdmPromise>();
   return session_id_to_promise_map_.take_and_erase(it);
 }
 
 }  // namespace content