Add Stop() to AudioDecoder.

media/filters/decrypting_audio_decoder_unittest.cc

Index: media/filters/decrypting_audio_decoder_unittest.cc
diff --git a/media/filters/decrypting_audio_decoder_unittest.cc b/media/filters/decrypting_audio_decoder_unittest.cc
index 2f07e231c03b2c98a16217297e59cd1c6c4f8922..7910ef1b4e3069c77d2a1625f14962224b37de4c 100644
--- a/media/filters/decrypting_audio_decoder_unittest.cc
+++ b/media/filters/decrypting_audio_decoder_unittest.cc
@@ -84,6 +84,10 @@ class DecryptingAudioDecoderTest : public testing::Test {
         decoded_frame_list_() {
   }
 
+  virtual ~DecryptingAudioDecoderTest() {
+    Stop();
+  }
+
   void InitializeAndExpectStatus(const AudioDecoderConfig& config,
                                  PipelineStatus status) {
     // Initialize data now that the config is known. Since the code uses
@@ -208,6 +212,16 @@ class DecryptingAudioDecoderTest : public testing::Test {
     }
   }
 
+  void AbortAllPendingCBs() {
+    if (!pending_init_cb_.is_null()) {
+      ASSERT_TRUE(pending_audio_decode_cb_.is_null());
+      base::ResetAndReturn(&pending_init_cb_).Run(false);
+      return;
+    }
+
+    AbortPendingAudioDecodeCB();
+  }
+
   void Reset() {
     EXPECT_CALL(*decryptor_, ResetDecoder(Decryptor::kAudio))
         .WillRepeatedly(InvokeWithoutArgs(
@@ -217,6 +231,18 @@ class DecryptingAudioDecoderTest : public testing::Test {
     message_loop_.RunUntilIdle();
   }
 
+  void Stop() {
+    EXPECT_CALL(*decryptor_, RegisterNewKeyCB(Decryptor::kAudio,
+                                              IsNullCallback()))
+        .Times(AtMost(1));
+    EXPECT_CALL(*decryptor_, DeinitializeDecoder(Decryptor::kAudio))
+        .WillRepeatedly(InvokeWithoutArgs(
+            this, &DecryptingAudioDecoderTest::AbortAllPendingCBs));
+
+    decoder_->Stop(NewExpectedClosure());
+    message_loop_.RunUntilIdle();
+  }
+
   MOCK_METHOD1(RequestDecryptorNotification, void(const DecryptorReadyCB&));
 
   MOCK_METHOD2(FrameReady,