Remove ignored return code from modules.

webrtc/modules/audio_device/audio_device_impl.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 27 matching lines @@
   };
 
   int32_t CheckPlatform();
   int32_t CreatePlatformSpecificObjects();
   int32_t AttachAudioBuffer();
 
   AudioDeviceModuleImpl(const int32_t id, const AudioLayer audioLayer);
   virtual ~AudioDeviceModuleImpl();
 
   int64_t TimeUntilNextProcess() override;
-  int32_t Process() override;
+  void Process() override;
 
   // Factory methods (resource allocation/deallocation)
   static AudioDeviceModule* Create(
       const int32_t id,
       const AudioLayer audioLayer = kPlatformDefaultAudio);
 
   // Retrieve the currently utilized audio layer
   int32_t ActiveAudioLayer(AudioLayer* audioLayer) const override;
 
   // Error handling
@@ skipping 166 matching lines @@
   PlatformType _platformType;
   bool _initialized;
   mutable ErrorCode _lastError;
 };
 
 }  // namespace webrtc
 
 #endif  // defined(WEBRTC_INCLUDE_INTERNAL_AUDIO_DEVICE)
 
 #endif  // WEBRTC_MODULES_INTERFACE_AUDIO_DEVICE_IMPL_H_