Use static_cast for various CPDF_Object conversions.

core/src/fpdfdoc/doc_form.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 "../../include/fpdfdoc/fpdf_doc.h"
 #include "doc_utils.h"
 
 const int nMaxRecursion = 32;
@@ skipping 1168 matching lines @@
   CPDF_Dictionary* pMainDict = pDoc->GetRoot()->GetDict("FDF");
   if (!pdf_path.IsEmpty()) {
     if (bSimpleFileSpec) {
       CFX_WideString wsFilePath = FILESPEC_EncodeFileName(pdf_path);
       pMainDict->SetAtString(FX_BSTRC("F"),
                              CFX_ByteString::FromUnicode(wsFilePath));
       pMainDict->SetAtString(FX_BSTRC("UF"), PDF_EncodeText(wsFilePath));
     } else {
       CPDF_FileSpec filespec;
       filespec.SetFileName(pdf_path);
-      pMainDict->SetAt("F", (CPDF_Object*)filespec);
+      pMainDict->SetAt("F", static_cast<CPDF_Object*>(filespec));
     }
   }
   CPDF_Array* pFields = CPDF_Array::Create();
   if (pFields == NULL) {
     return NULL;
   }
   pMainDict->SetAt("Fields", pFields);
   int nCount = m_pFieldTree->m_Root.CountFields();
   for (int i = 0; i < nCount; i++) {
     CPDF_FormField* pField = m_pFieldTree->m_Root.GetField(i);
@@ skipping 170 matching lines @@
     FDF_ImportField(pField, L"", bNotify);
   }
   if (bNotify && m_pFormNotify != NULL) {
     m_pFormNotify->AfterFormImportData(this);
   }
   return TRUE;
 }
 void CPDF_InterForm::SetFormNotify(const CPDF_FormNotify* pNotify) {
   m_pFormNotify = (CPDF_FormNotify*)pNotify;
 }