Revert "Chromium changes to statically link ffmpeg."

media/filters/ffmpeg_glue.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/filters/ffmpeg_glue.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/synchronization/lock.h"
@@ skipping 78 matching lines @@
 // FFmpeg must only be initialized once, so use a LazyInstance to ensure this.
 class FFmpegInitializer {
  public:
   bool initialized() { return initialized_; }
 
  private:
   friend struct base::DefaultLazyInstanceTraits<FFmpegInitializer>;
 
   FFmpegInitializer()
       : initialized_(false) {
+    // Before doing anything disable logging as it interferes with layout tests.
+    av_log_set_level(AV_LOG_QUIET);
+
     // Register our protocol glue code with FFmpeg.
     if (av_lockmgr_register(&LockManagerOperation) != 0)
       return;
 
     // Now register the rest of FFmpeg.
     av_register_all();
 
     initialized_ = true;
   }
 
@@ skipping 102 matching lines @@
         avcodec_close(stream->codec);
       }
     }
   }
 
   avformat_close_input(&format_context_);
   av_free(avio_context_->buffer);
 }
 
 }  // namespace media