Move ADM Create() method to public interface.

webrtc/modules/audio_device/ios/audio_device_ios.h

Index: webrtc/modules/audio_device/ios/audio_device_ios.h
diff --git a/webrtc/modules/audio_device/ios/audio_device_ios.h b/webrtc/modules/audio_device/ios/audio_device_ios.h
index 786f718a22968dd84124c664aba43515ec92f719..8e630dd1a8d656d018ba30bd8606ae533652a684 100644
--- a/webrtc/modules/audio_device/ios/audio_device_ios.h
+++ b/webrtc/modules/audio_device/ios/audio_device_ios.h
@@ -217,7 +217,7 @@ class AudioDeviceIOS : public AudioDeviceGeneric,
   std::unique_ptr<rtc::AsyncInvoker> async_invoker_;
 
   // Raw pointer handle provided to us in AttachAudioBuffer(). Owned by the
-  // AudioDeviceModuleImpl class and called by AudioDeviceModuleImpl::Create().
+  // AudioDeviceModuleImpl class and called by AudioDeviceModule::Create().
   // The AudioDeviceBuffer is a member of the AudioDeviceModuleImpl instance
   // and therefore outlives this object.
   AudioDeviceBuffer* audio_device_buffer_;