PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_audio_input_api.h

Index: ppapi/thunk/ppb_audio_input_api.h
diff --git a/ppapi/thunk/ppb_audio_input_api.h b/ppapi/thunk/ppb_audio_input_api.h
index 38e94ef650ce54d4092a32d0dd75a10d06ea794b..dee40501f2ddbf2c2900418013a2d5a5df035461 100644
--- a/ppapi/thunk/ppb_audio_input_api.h
+++ b/ppapi/thunk/ppb_audio_input_api.h
@@ -10,6 +10,7 @@
 
 #include "ppapi/c/dev/ppb_audio_input_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/shared_impl/api_callback_type.h"
 #include "ppapi/thunk/ppapi_thunk_export.h"
 
 namespace ppapi {
@@ -24,12 +25,12 @@ class PPAPI_THUNK_EXPORT PPB_AudioInput_API {
 
   virtual int32_t EnumerateDevices(
       PP_Resource* devices,
-      const PP_CompletionCallback& callback) = 0;
+      ApiCallbackType callback) = 0;
   virtual int32_t Open(const std::string& device_id,
                        PP_Resource config,
                        PPB_AudioInput_Callback audio_input_callback,
                        void* user_data,
-                       const PP_CompletionCallback& callback) = 0;
+                       ApiCallbackType callback) = 0;
   virtual PP_Resource GetCurrentConfig() = 0;
   virtual PP_Bool StartCapture() = 0;
   virtual PP_Bool StopCapture() = 0;
@@ -39,7 +40,7 @@ class PPAPI_THUNK_EXPORT PPB_AudioInput_API {
   virtual int32_t OpenTrusted(
       const std::string& device_id,
       PP_Resource config,
-      const PP_CompletionCallback& create_callback) = 0;
+      ApiCallbackType create_callback) = 0;
   virtual int32_t GetSyncSocket(int* sync_socket) = 0;
   virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) = 0;
   virtual const std::vector<DeviceRefData>& GetDeviceRefData() const = 0;