Fix warnings, simplify ADM.

webrtc/modules/audio_device/win/audio_device_core_win.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.
  */
 
@@ skipping 4176 matching lines @@
     {
         WEBRTC_TRACE(kTraceError, kTraceAudioDevice, _id,
             "Built-in AEC DMO was not initialized properly at create time");
         return -1;
     }
 
     _builtInAecEnabled = enable;
     return 0;
 }
 
-bool AudioDeviceWindowsCore::BuiltInAECIsEnabled() const
-{
-    return _builtInAecEnabled;
-}
-
 int AudioDeviceWindowsCore::SetDMOProperties()
 {
     HRESULT hr = S_OK;
     assert(_dmo != NULL);
 
     rtc::scoped_refptr<IPropertyStore> ps;
     {
         IPropertyStore* ptrPS = NULL;
         hr = _dmo->QueryInterface(IID_IPropertyStore,
                                   reinterpret_cast<void**>(&ptrPS));
@@ skipping 884 matching lines @@
   int key_down = 0;
   for (int key = VK_SPACE; key < VK_NUMLOCK; key++) {
     short res = GetAsyncKeyState(key);
     key_down |= res & 0x1; // Get the LSB
   }
   return (key_down > 0);
 }
 }  // namespace webrtc
 
 #endif  // WEBRTC_WINDOWS_CORE_AUDIO_BUILD