Prep to remove API-related #defines from voice_engine_configurations.h

webrtc/voice_engine/voe_volume_control_impl.cc

 /*
  *  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.
  */
 
 #include "webrtc/voice_engine/voe_volume_control_impl.h"
 
 #include "webrtc/system_wrappers/include/trace.h"
 #include "webrtc/voice_engine/channel.h"
 #include "webrtc/voice_engine/include/voe_errors.h"
 #include "webrtc/voice_engine/output_mixer.h"
 #include "webrtc/voice_engine/transmit_mixer.h"
 #include "webrtc/voice_engine/voice_engine_impl.h"
 
+#ifndef WEBRTC_VOICE_ENGINE_VOLUME_CONTROL_API
+#error "Deprecated"
+#endif
+
 namespace webrtc {
 
 VoEVolumeControl* VoEVolumeControl::GetInterface(VoiceEngine* voiceEngine) {
 #ifndef WEBRTC_VOICE_ENGINE_VOLUME_CONTROL_API
   return NULL;
 #else
   if (NULL == voiceEngine) {
     return NULL;
   }
   VoiceEngineImpl* s = static_cast<VoiceEngineImpl*>(voiceEngine);
@@ skipping 380 matching lines @@
     _shared->SetLastError(VE_CHANNEL_NOT_VALID, kTraceError,
                           "GetOutputVolumePan() failed to locate channel");
     return -1;
   }
   return channelPtr->GetOutputVolumePan(left, right);
 }
 
 #endif  // #ifdef WEBRTC_VOICE_ENGINE_VOLUME_CONTROL_API
 
 }  // namespace webrtc