Remove calls to MessageLoop::current() in media.

media/audio/audio_input_device.cc

Index: media/audio/audio_input_device.cc
diff --git a/media/audio/audio_input_device.cc b/media/audio/audio_input_device.cc
index fc6b39285ad363aeb2e7591eacfcd77b8d97bfbb..b8fcbdea1b56cf6474f88b49c473873a06466848 100644
--- a/media/audio/audio_input_device.cc
+++ b/media/audio/audio_input_device.cc
@@ -12,6 +12,7 @@
 #include "base/memory/scoped_vector.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "media/audio/audio_manager_base.h"
@@ -94,7 +95,7 @@ void AudioInputDevice::Stop() {
 
   {
     base::AutoLock auto_lock(audio_thread_lock_);
-    audio_thread_.Stop(base::MessageLoop::current());
+    audio_thread_.Stop(base::ThreadTaskRunnerHandle::Get());
     stopping_hack_ = true;
   }