Remove redundant casts, part 4

fpdfsdk/fsdk_actionhandler.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "fpdfsdk/include/fsdk_actionhandler.h"
 
 #include <set>
 
@@ skipping 586 matching lines @@
   FX_BOOL bRet = pContext->RunScript(script, &csInfo);
   if (!bRet) {
     // FIXME: return error.
   }
 
   pRuntime->ReleaseContext(pContext);
 }
 
 FX_BOOL CPDFSDK_FormActionHandler::DoAction_Hide(const CPDF_Action& action,
                                                  CPDFSDK_Document* pDocument) {
-  CPDFSDK_InterForm* pInterForm = (CPDFSDK_InterForm*)pDocument->GetInterForm();
+  CPDFSDK_InterForm* pInterForm = pDocument->GetInterForm();
   if (pInterForm->DoAction_Hide(action)) {
     pDocument->SetChangeMark();
     return TRUE;
   }
 
   return FALSE;
 }
 
 FX_BOOL CPDFSDK_FormActionHandler::DoAction_SubmitForm(
     const CPDF_Action& action,
     CPDFSDK_Document* pDocument) {
-  CPDFSDK_InterForm* pInterForm = (CPDFSDK_InterForm*)pDocument->GetInterForm();
+  CPDFSDK_InterForm* pInterForm = pDocument->GetInterForm();
   return pInterForm->DoAction_SubmitForm(action);
 }
 
 FX_BOOL CPDFSDK_FormActionHandler::DoAction_ResetForm(
     const CPDF_Action& action,
     CPDFSDK_Document* pDocument) {
-  CPDFSDK_InterForm* pInterForm = (CPDFSDK_InterForm*)pDocument->GetInterForm();
+  CPDFSDK_InterForm* pInterForm = pDocument->GetInterForm();
   return pInterForm->DoAction_ResetForm(action);
 }
 
 FX_BOOL CPDFSDK_FormActionHandler::DoAction_ImportData(
     const CPDF_Action& action,
     CPDFSDK_Document* pDocument) {
-  CPDFSDK_InterForm* pInterForm = (CPDFSDK_InterForm*)pDocument->GetInterForm();
+  CPDFSDK_InterForm* pInterForm = pDocument->GetInterForm();
   if (pInterForm->DoAction_ImportData(action)) {
     pDocument->SetChangeMark();
     return TRUE;
   }
 
   return FALSE;
 }