Remove dead code related to media device enumerations and monitoring.

content/browser/renderer_host/media/audio_input_device_manager_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 "content/browser/renderer_host/media/audio_input_device_manager.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 158 matching lines @@
   }
 }
 
 // Opens a non-existing device.
 TEST_F(MAYBE_AudioInputDeviceManagerTest, OpenNotExistingDevice) {
   InSequence s;
 
   MediaStreamType stream_type = MEDIA_DEVICE_AUDIO_CAPTURE;
   std::string device_name("device_doesnt_exist");
   std::string device_id("id_doesnt_exist");
-  std::string group_id("group_doesnt_exist");
   int sample_rate(0);
   int channel_config(0);
-  StreamDeviceInfo dummy_device(stream_type, device_name, device_id, group_id,
+  StreamDeviceInfo dummy_device(stream_type, device_name, device_id,
                                 sample_rate, channel_config, 2048);
 
   int session_id = manager_->Open(dummy_device);
   EXPECT_CALL(*audio_input_listener_,
               Opened(MEDIA_DEVICE_AUDIO_CAPTURE, session_id))
       .Times(1);
 
   // Waits for the callback.
   base::RunLoop().RunUntilIdle();
 }
@@ skipping 84 matching lines @@
   DCHECK(!info);
 
   manager_->Close(session_id);
   EXPECT_CALL(*audio_input_listener_,
               Closed(MEDIA_DEVICE_AUDIO_CAPTURE, session_id))
       .Times(1);
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace content