Convert to new enter method

ppapi/thunk/ppb_audio_trusted_thunk.cc

Index: ppapi/thunk/ppb_audio_trusted_thunk.cc
diff --git a/ppapi/thunk/ppb_audio_trusted_thunk.cc b/ppapi/thunk/ppb_audio_trusted_thunk.cc
index da49425412ee2d3bb7115aaffdeb3b1185e5b5a5..a990415341e6361501086da9316e4b057567e996 100644
--- a/ppapi/thunk/ppb_audio_trusted_thunk.cc
+++ b/ppapi/thunk/ppb_audio_trusted_thunk.cc
@@ -4,7 +4,6 @@
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/trusted/ppb_audio_trusted.h"
-#include "ppapi/thunk/common.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/thunk.h"
 #include "ppapi/thunk/ppb_audio_api.h"
@@ -26,18 +25,17 @@ PP_Resource Create(PP_Instance instance_id) {
 
 int32_t Open(PP_Resource audio_id,
              PP_Resource config_id,
-             PP_CompletionCallback create_callback) {
-  EnterAudio enter(audio_id, true);
+             PP_CompletionCallback callback) {
+  EnterAudio enter(audio_id, callback, true);
   if (enter.failed())
-    return MayForceCallback(create_callback, PP_ERROR_BADRESOURCE);
-  int32_t result = enter.object()->OpenTrusted(config_id, create_callback);
-  return MayForceCallback(create_callback, result);
+    return enter.retval();
+  return enter.SetResult(enter.object()->OpenTrusted(config_id, callback));
 }
 
 int32_t GetSyncSocket(PP_Resource audio_id, int* sync_socket) {
   EnterAudio enter(audio_id, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
+    return enter.retval();
   return enter.object()->GetSyncSocket(sync_socket);
 }
 
@@ -46,7 +44,7 @@ int32_t GetSharedMemory(PP_Resource audio_id,
                         uint32_t* shm_size) {
   EnterAudio enter(audio_id, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
+    return enter.retval();
   return enter.object()->GetSharedMemory(shm_handle, shm_size);
 }