Fix wrong timing when audio is muted.

media/audio/audio_output_proxy_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 "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/threading/platform_thread.h"
 #include "media/audio/audio_output_dispatcher_impl.h"
@@ skipping 447 matching lines @@
       .Times(1);
   EXPECT_CALL(stream, Close())
       .Times(1);
 
   AudioOutputProxy* proxy1 = new AudioOutputProxy(mixer_);
   AudioOutputProxy* proxy2 = new AudioOutputProxy(mixer_);
   EXPECT_TRUE(proxy1->Open());
   EXPECT_TRUE(proxy2->Open());
 
   proxy1->Start(&callback_);
+
+  // Mute the proxy. Resulting stream should still have correct length.
+  proxy1->SetVolume(0.0);
+
   uint8 zeroes[4] = {0, 0, 0, 0};
   uint8 buf1[4] = {0};
   EXPECT_CALL(callback_,
       OnMoreData(NotNull(), 4,
                  AllOf(Field(&AudioBuffersState::pending_bytes, 0),
                        Field(&AudioBuffersState::hardware_delay_bytes, 0))))
       .WillOnce(DoAll(SetArrayArgument<0>(zeroes, zeroes + sizeof(zeroes)),
                       Return(4)));
   mixer_->OnMoreData(buf1, sizeof(buf1), AudioBuffersState(0, 0));
   proxy2->Start(&callback_);
@@ skipping 101 matching lines @@
 
   proxy2->Start(&callback_);
 
   Mock::VerifyAndClear(&callback_);
 
   proxy2->Close();
   WaitForCloseTimer(kTestCloseDelayMs);
 }
 
 }  // namespace media