Pass a |media_log| to FFmpegVideoDecoder and roll ffmpeg

media/ffmpeg/ffmpeg_common.cc

 // 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.
 
 #include "media/ffmpeg/ffmpeg_common.h"
 
 #include "base/logging.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
@@ skipping 726 matching lines @@
       return COLOR_SPACE_HD_REC709;
     case AVCOL_SPC_SMPTE170M:
     case AVCOL_SPC_BT470BG:
       return COLOR_SPACE_SD_REC601;
     default:
       DVLOG(1) << "Unknown AVColorSpace: " << color_space;
   }
   return COLOR_SPACE_UNSPECIFIED;
 }
 
+std::string AVErrorToString(int errnum) {
+  char errbuf[AV_ERROR_MAX_STRING_SIZE] = {0};
+  av_strerror(errnum, errbuf, AV_ERROR_MAX_STRING_SIZE);
+  return std::string(errbuf);
+}
+
 int32_t HashCodecName(const char* codec_name) {
   // Use the first 32-bits from the SHA1 hash as the identifier.
   int32_t hash;
   memcpy(&hash, base::SHA1HashString(codec_name).substr(0, 4).c_str(), 4);
   return hash;
 }
 
 }  // namespace media