Add Decryptor interface.

media/filters/ffmpeg_video_decoder_unittest.cc

Index: media/filters/ffmpeg_video_decoder_unittest.cc
diff --git a/media/filters/ffmpeg_video_decoder_unittest.cc b/media/filters/ffmpeg_video_decoder_unittest.cc
index 9ff6783752d424a8e18b6a9d2a633fc0145a1042..66a856e4dd24b22b2a63c1dc4af7251d5bce04f6 100644
--- a/media/filters/ffmpeg_video_decoder_unittest.cc
+++ b/media/filters/ffmpeg_video_decoder_unittest.cc
@@ -17,6 +17,7 @@
 #include "media/base/test_data_util.h"
 #include "media/base/video_decoder.h"
 #include "media/base/video_frame.h"
+#include "media/crypto/aes_decryptor.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_decoder_unittest.h"
 #include "media/filters/ffmpeg_glue.h"
@@ -209,7 +210,7 @@ class FFmpegVideoDecoderTest : public testing::Test {
                                 scoped_refptr<VideoFrame>));
 
   MessageLoop message_loop_;
-  scoped_ptr<AesDecryptor> decryptor_;
+  scoped_ptr<Decryptor> decryptor_;
   scoped_refptr<FFmpegVideoDecoder> decoder_;
   scoped_refptr<StrictMock<MockDemuxerStream> > demuxer_;
   MockStatisticsCB statistics_cb_;