Introduce AudioDecoderConfig to migrate away from GetAVStream().

media/video/ffmpeg_video_decode_engine_unittest.cc

 // Copyright (c) 2011 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 "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "media/base/data_buffer.h"
 #include "media/base/mock_task.h"
 #include "media/base/pipeline.h"
 #include "media/base/test_data_util.h"
@@ skipping 131 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecodeEngineTest);
 };
 
 TEST_F(FFmpegVideoDecodeEngineTest, Initialize_Normal) {
   Initialize();
 }
 
 TEST_F(FFmpegVideoDecodeEngineTest, Initialize_FindDecoderFails) {
-  VideoDecoderConfig config(kUnknown, kCodedSize, kVisibleRect, kNaturalSize,
-                            kFrameRate.num, kFrameRate.den, NULL, 0);
+  VideoDecoderConfig config(kUnknownVideoCodec, kCodedSize, kVisibleRect,
+                            kNaturalSize, kFrameRate.num, kFrameRate.den,
+                            NULL, 0);
+
   // Test avcodec_find_decoder() returning NULL.
   VideoCodecInfo info;
   EXPECT_CALL(*this, OnInitializeComplete(_))
      .WillOnce(SaveArg<0>(&info));
   test_engine_->Initialize(MessageLoop::current(), this, NULL, config);
   EXPECT_FALSE(info.success);
 }
 
 TEST_F(FFmpegVideoDecodeEngineTest, Initialize_OpenDecoderFails) {
   // Specify Theora w/o extra data so that avcodec_open() fails.
@@ skipping 110 matching lines @@
 //  DecodeIFrameThenTestFile("vp8-I-frame-320x480");
 //}
 
 // Decode |i_frame_buffer_| and then a frame with a smaller height and verify
 // the output size didn't change.
 TEST_F(FFmpegVideoDecodeEngineTest, DecodeFrame_SmallerHeight) {
   DecodeIFrameThenTestFile("vp8-I-frame-320x120");
 }
 
 }  // namespace media