Fix the flushing process of DecryptingAudioDecoder.

media/filters/decrypting_video_decoder_unittest.cc

Index: media/filters/decrypting_video_decoder_unittest.cc
diff --git a/media/filters/decrypting_video_decoder_unittest.cc b/media/filters/decrypting_video_decoder_unittest.cc
index 738753b518bfe8654395e3554b90e8e6c32d13f6..073a5273d46a79c697251924afa8f81d7227b602 100644
--- a/media/filters/decrypting_video_decoder_unittest.cc
+++ b/media/filters/decrypting_video_decoder_unittest.cc
@@ -53,6 +53,10 @@ ACTION_P2(ResetAndRunCallback, callback, param) {
   base::ResetAndReturn(callback).Run(param);
 }
 
+MATCHER(IsEndOfStream, "end of stream") {
+  return (arg->end_of_stream());
+}
+
 }  // namespace
 
 class DecryptingVideoDecoderTest : public testing::Test {
@@ -152,7 +156,9 @@ class DecryptingVideoDecoderTest : public testing::Test {
   // of stream state. This function must be called after
   // EnterNormalDecodingState() to work.
   void EnterEndOfStreamState() {
-    // The codec in the |decryptor_| will be flushed.
+    // The codec in the |decryptor_| will be flushed. We expect kDecodingDelay
+    // frames to be returned followed by a EOS frame.
+    EXPECT_CALL(*this, FrameReady(IsEndOfStream()));
     EXPECT_CALL(*this, FrameReady(decoded_video_frame_))
         .Times(kDecodingDelay);
     DecodeAndExpect(DecoderBuffer::CreateEOSBuffer(), VideoDecoder::kOk);