Encrypted Media: DecryptingXxx::SetDecryptor() accepts NULL decryptor.

media/filters/decrypting_audio_decoder_unittest.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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/message_loop.h"
@@ skipping 252 matching lines @@
   EXPECT_CALL(*decryptor_, InitializeAudioDecoder(_, _))
       .WillOnce(RunCallback<1>(false));
   EXPECT_CALL(*this, RequestDecryptorNotification(_))
       .WillOnce(RunCallbackIfNotNull(decryptor_.get()));
 
   AudioDecoderConfig config(kCodecVorbis, kSampleFormatPlanarF32,
                             CHANNEL_LAYOUT_STEREO, 44100, NULL, 0, true);
   InitializeAndExpectStatus(config, DECODER_ERROR_NOT_SUPPORTED);
 }
 
+TEST_F(DecryptingAudioDecoderTest, Initialize_NullDecryptor) {
+  EXPECT_CALL(*this, RequestDecryptorNotification(_))
+      .WillRepeatedly(RunCallbackIfNotNull(static_cast<Decryptor*>(NULL)));
+
+  AudioDecoderConfig config(kCodecVorbis, kSampleFormatPlanarF32,
+                            CHANNEL_LAYOUT_STEREO, 44100, NULL, 0, true);
+  InitializeAndExpectStatus(config, DECODER_ERROR_NOT_SUPPORTED);
+}
+
 // Test normal decrypt and decode case.
 TEST_F(DecryptingAudioDecoderTest, DecryptAndDecode_Normal) {
   Initialize();
   EnterNormalDecodingState();
 }
 
 // Test the case where the decryptor returns error when doing decrypt and
 // decode.
 TEST_F(DecryptingAudioDecoderTest, DecryptAndDecode_DecodeError) {
   Initialize();
@@ skipping 295 matching lines @@
 
 // Test resetting after the decoder has been reset.
 TEST_F(DecryptingAudioDecoderTest, Reset_AfterReset) {
   Initialize();
   EnterNormalDecodingState();
   Reset();
   Reset();
 }
 
 }  // namespace media