PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_broker_api.h

Index: ppapi/thunk/ppb_broker_api.h
diff --git a/ppapi/thunk/ppb_broker_api.h b/ppapi/thunk/ppb_broker_api.h
index 8703a7b89a724bd06d99c774b0164daeaf0aa0cf..5cea8de96cd7dc30d66797ecd19cdf0b245ffdcf 100644
--- a/ppapi/thunk/ppb_broker_api.h
+++ b/ppapi/thunk/ppb_broker_api.h
@@ -7,6 +7,7 @@
 
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_stdint.h"
+#include "ppapi/shared_impl/api_callback_type.h"
 
 namespace ppapi {
 namespace thunk {
@@ -15,7 +16,7 @@ class PPB_Broker_API {
  public:
   virtual ~PPB_Broker_API() {}
 
-  virtual int32_t Connect(PP_CompletionCallback connect_callback) = 0;
+  virtual int32_t Connect(ApiCallbackType connect_callback) = 0;
   virtual int32_t GetHandle(int32_t* handle) = 0;
 };