PPAPI: Make blocking completion callbacks work.

webkit/plugins/ppapi/ppb_audio_input_impl.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 WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_INPUT_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_INPUT_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 21 matching lines @@
   // and will return 0 on failure.
   static PP_Resource Create0_1(PP_Instance instance,
                                PP_Resource config,
                                PPB_AudioInput_Callback audio_input_callback,
                                void* user_data);
 
   // Implementation of PPB_AudioInput_API trusted methods.
   virtual int32_t OpenTrusted(
       const std::string& device_id,
       PP_Resource config,
-      const PP_CompletionCallback& create_callback) OVERRIDE;
+      scoped_refptr< ::ppapi::TrackedCallback> create_callback) OVERRIDE;
   virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE;
   virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE;
   virtual const DeviceRefDataVector& GetDeviceRefData() const OVERRIDE;
 
   // PluginDelegate::PlatformAudioInputClient implementation.
   virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
                              size_t shared_memory_size,
                              base::SyncSocket::Handle socket) OVERRIDE;
   virtual void StreamCreationFailed() OVERRIDE;
 
  private:
   // PPB_AudioInput_Shared implementation.
   virtual int32_t InternalEnumerateDevices(
       PP_Resource* devices,
-      PP_CompletionCallback callback) OVERRIDE;
-  virtual int32_t InternalOpen(const std::string& device_id,
-                               PP_AudioSampleRate sample_rate,
-                               uint32_t sample_frame_count,
-                               PP_CompletionCallback callback) OVERRIDE;
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
+  virtual int32_t InternalOpen(
+      const std::string& device_id,
+      PP_AudioSampleRate sample_rate,
+      uint32_t sample_frame_count,
+      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
   virtual PP_Bool InternalStartCapture() OVERRIDE;
   virtual PP_Bool InternalStopCapture() OVERRIDE;
   virtual void InternalClose() OVERRIDE;
 
   void EnumerateDevicesCallbackFunc(int request_id,
                                     bool succeeded,
                                     const DeviceRefDataVector& devices);
 
   // PluginDelegate audio input object that we delegate audio IPC through.
   // We don't own this pointer but are responsible for calling Shutdown on it.
   PluginDelegate::PlatformAudioInput* audio_input_;
 
   DeviceRefDataVector devices_data_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_AudioInput_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_INPUT_IMPL_H_