Add an asynchronous version of the Flash DeviceID API.

ppapi/shared_impl/ppb_audio_config_shared.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_SHARED_IMPL_PPB_AUDIO_CONFIG_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_AUDIO_CONFIG_SHARED_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ppapi/shared_impl/resource.h"
@@ skipping 20 matching lines @@
 
   // Resource overrides.
   virtual thunk::PPB_AudioConfig_API* AsPPB_AudioConfig_API() OVERRIDE;
 
   // PPB_AudioConfig_API implementation.
   virtual PP_AudioSampleRate GetSampleRate() OVERRIDE;
   virtual uint32_t GetSampleFrameCount() OVERRIDE;
 
  private:
   // You must call Init before using this object.
-  explicit PPB_AudioConfig_Shared(ResourceObjectType type,
-                                  PP_Instance instance);
+  PPB_AudioConfig_Shared(ResourceObjectType type, PP_Instance instance);
 
   // Returns false if the arguments are invalid, the object should not be
   // used in this case.
   bool Init(PP_AudioSampleRate sample_rate, uint32_t sample_frame_count);
 
   PP_AudioSampleRate sample_rate_;
   uint32_t sample_frame_count_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_AudioConfig_Shared);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_AUDIO_CONFIG_SHARED_H_