Convert to new enter method

ppapi/thunk/ppb_input_event_thunk.cc

 // 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.
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/thunk/thunk.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_input_event_api.h"
 #include "ppapi/thunk/ppb_instance_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
 namespace ppapi {
 namespace thunk {
 
 namespace {
 
 typedef EnterFunction<PPB_Instance_FunctionAPI> EnterInstance;
 typedef EnterResource<PPB_InputEvent_API> EnterInputEvent;
 
 // InputEvent ------------------------------------------------------------------
 
 int32_t RequestInputEvents(PP_Instance instance, uint32_t event_classes) {
   EnterInstance enter(instance, true);
   if (enter.failed())
-    return PP_ERROR_BADARGUMENT;
+    return enter.retval();
   return enter.functions()->RequestInputEvents(instance, event_classes);
 }
 
 int32_t RequestFilteringInputEvents(PP_Instance instance,
                                     uint32_t event_classes) {
   EnterInstance enter(instance, true);
   if (enter.failed())
-    return PP_ERROR_BADARGUMENT;
+    return enter.retval();
   return enter.functions()->RequestFilteringInputEvents(instance,
                                                         event_classes);
 }
 
 void ClearInputEventRequest(PP_Instance instance,
                             uint32_t event_classes) {
   EnterInstance enter(instance, true);
   if (enter.succeeded())
     enter.functions()->ClearInputEventRequest(instance, event_classes);
 }
@@ skipping 306 matching lines @@
 const PPB_WheelInputEvent_1_0* GetPPB_WheelInputEvent_1_0_Thunk() {
   return &g_ppb_wheel_input_event_thunk;
 }
 
 const PPB_IMEInputEvent_Dev_0_1* GetPPB_IMEInputEvent_Dev_0_1_Thunk() {
   return &g_ppb_ime_input_event_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi