Log MediaSource parsing errors to the MediaLog so they can appear in chrome:media-internals.

media/webm/webm_content_encodings_client.h

 // Copyright (c) 2012 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 MEDIA_WEBM_WEBM_CONTENT_ENCODINGS_CLIENT_H_
 #define MEDIA_WEBM_WEBM_CONTENT_ENCODINGS_CLIENT_H_
 
 #include <vector>
 
+#include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
+#include "media/base/media_log.h"
 #include "media/webm/webm_content_encodings.h"
 #include "media/webm/webm_parser.h"
 
 namespace media {
 
 typedef std::vector<ContentEncoding*> ContentEncodings;
 
 // Parser for WebM ContentEncodings element.
 class MEDIA_EXPORT WebMContentEncodingsClient : public WebMParserClient {
  public:
-  WebMContentEncodingsClient();
+  explicit WebMContentEncodingsClient(const LogCB& log_cb);
   virtual ~WebMContentEncodingsClient();
 
   const ContentEncodings& content_encodings() const;
 
   // WebMParserClient methods
   virtual WebMParserClient* OnListStart(int id) OVERRIDE;
   virtual bool OnListEnd(int id) OVERRIDE;
   virtual bool OnUInt(int id, int64 val) OVERRIDE;
   virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE;
 
  private:
+  LogCB log_cb_;
   scoped_ptr<ContentEncoding> cur_content_encoding_;
   bool content_encryption_encountered_;
   ContentEncodings content_encodings_;
 
   // |content_encodings_| is ready. For debugging purpose.
   bool content_encodings_ready_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMContentEncodingsClient);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_WEBM_WEBM_CONTENT_ENCODINGS_CLIENT_H_