PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_transport_api.h

Index: ppapi/thunk/ppb_transport_api.h
diff --git a/ppapi/thunk/ppb_transport_api.h b/ppapi/thunk/ppb_transport_api.h
index 256d92053c3006e7c17dc8305c92eb3a6613d037..9d9b77f572e6deb40bcf69a77613c21d614701a4 100644
--- a/ppapi/thunk/ppb_transport_api.h
+++ b/ppapi/thunk/ppb_transport_api.h
@@ -6,6 +6,7 @@
 #define PPAPI_THUNK_PPB_TRANSPORT_API_H_
 
 #include "ppapi/c/dev/ppb_transport_dev.h"
+#include "ppapi/shared_impl/api_callback_type.h"
 
 namespace ppapi {
 namespace thunk {
@@ -16,14 +17,14 @@ class PPB_Transport_API {
 
   virtual PP_Bool IsWritable() = 0;
   virtual int32_t SetProperty(PP_TransportProperty property, PP_Var value) = 0;
-  virtual int32_t Connect(PP_CompletionCallback callback) = 0;
+  virtual int32_t Connect(ApiCallbackType callback) = 0;
   virtual int32_t GetNextAddress(PP_Var* address,
-                                 PP_CompletionCallback callback) = 0;
+                                 ApiCallbackType callback) = 0;
   virtual int32_t ReceiveRemoteAddress(PP_Var address) = 0;
   virtual int32_t Recv(void* data, uint32_t len,
-                       PP_CompletionCallback callback) = 0;
+                       ApiCallbackType callback) = 0;
   virtual int32_t Send(const void* data, uint32_t len,
-                       PP_CompletionCallback callback) = 0;
+                       ApiCallbackType callback) = 0;
   virtual int32_t Close() = 0;
 };