Detect AudioInputStream muting and propagate to MediaStreamAudioSource.

media/audio/audio_input_device_unittest.cc

 // Copyright (c) 2017 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 "base/memory/ptr_util.h"
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/process_handle.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 36 matching lines @@
   ~MockCaptureCallback() override {}
 
   MOCK_METHOD0(OnCaptureStarted, void());
   MOCK_METHOD4(Capture,
                void(const AudioBus* audio_source,
                     int audio_delay_milliseconds,
                     double volume,
                     bool key_pressed));
 
   MOCK_METHOD1(OnCaptureError, void(const std::string& message));
+  MOCK_METHOD1(OnCaptureMuted, void(bool is_muted));
 };
 
 // Used to terminate a loop from a different thread than the loop belongs to.
 // |task_runner| should be a SingleThreadTaskRunner.
 ACTION_P(QuitLoop, task_runner) {
   task_runner->PostTask(FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
 }
 
 }  // namespace.
 
@@ skipping 73 matching lines @@
   EXPECT_CALL(*input_ipc, RecordStream());
   EXPECT_CALL(callback, OnCaptureStarted())
       .WillOnce(QuitLoop(io_loop.task_runner()));
   base::RunLoop().Run();
   device->Stop();
   base::RunLoop().RunUntilIdle();
   duplicated_memory_handle.Close();
 }
 
 }  // namespace media.