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

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 cd9424ce4b8361e9c47e43cb71a181e8539be991..27d4e5383ecb5823e8fb21460ad55cba704b626b 100644
--- a/media/filters/decrypting_video_decoder_unittest.cc
+++ b/media/filters/decrypting_video_decoder_unittest.cc
@@ -254,6 +254,13 @@ TEST_F(DecryptingVideoDecoderTest, Initialize_Normal) {
   Initialize();
 }
 
+TEST_F(DecryptingVideoDecoderTest, Initialize_NullDecryptor) {
+  EXPECT_CALL(*this, RequestDecryptorNotification(_))
+      .WillRepeatedly(RunCallbackIfNotNull(static_cast<Decryptor*>(NULL)));
+  InitializeAndExpectStatus(TestVideoConfig::NormalEncrypted(),
+                            DECODER_ERROR_NOT_SUPPORTED);
+}
+
 TEST_F(DecryptingVideoDecoderTest, Initialize_Failure) {
   EXPECT_CALL(*decryptor_, InitializeVideoDecoder(_, _))
       .WillRepeatedly(RunCallback<1>(false));