Remove media::BindToLoop() in favour of media::BindToCurrentLoop().

media/audio/win/audio_manager_win.cc

Index: media/audio/win/audio_manager_win.cc
diff --git a/media/audio/win/audio_manager_win.cc b/media/audio/win/audio_manager_win.cc
index 5e105dbd8ac24716278e40f9beb61fac19862803..968b917bde7d31a6f3b962ba1edf2c6c2d75fd08 100644
--- a/media/audio/win/audio_manager_win.cc
+++ b/media/audio/win/audio_manager_win.cc
@@ -162,17 +162,19 @@ bool AudioManagerWin::HasAudioInputDevices() {
 }
 
 void AudioManagerWin::CreateDeviceListener() {
+  DCHECK(GetTaskRunner()->BelongsToCurrentThread());
+
   // AudioDeviceListenerWin must be initialized on a COM thread and should only
   // be used if WASAPI / Core Audio is supported.
   if (CoreAudioUtil::IsSupported()) {
-    output_device_listener_.reset(new AudioDeviceListenerWin(BindToLoop(
-        GetTaskRunner(), base::Bind(
-            &AudioManagerWin::NotifyAllOutputDeviceChangeListeners,
-            base::Unretained(this)))));
+    output_device_listener_.reset(new AudioDeviceListenerWin(BindToCurrentLoop(
+        base::Bind(&AudioManagerWin::NotifyAllOutputDeviceChangeListeners,
+                   base::Unretained(this)))));
   }
 }
 
 void AudioManagerWin::DestroyDeviceListener() {
+  DCHECK(GetTaskRunner()->BelongsToCurrentThread());
   output_device_listener_.reset();
 }