Cleanup CPDF_DocPageData release methods and callers.

core/fpdfapi/fpdf_parser/cpdf_document.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 "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 
+#include <memory>
 #include <set>
+#include <vector>
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h"
 #include "core/fpdfapi/fpdf_page/cpdf_pagemodule.h"
 #include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_parser.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_reference.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
 #include "core/fpdfapi/fpdf_render/render_int.h"
@@ skipping 752 matching lines @@
 
 CPDF_Image* CPDF_Document::LoadImageF(CPDF_Object* pObj) {
   if (!pObj)
     return nullptr;
 
   ASSERT(pObj->GetObjNum());
   return m_pDocPage->GetImage(pObj);
 }
 
 void CPDF_Document::RemoveColorSpaceFromPageData(CPDF_Object* pCSObj) {
-  if (pCSObj)
-    GetPageData()->ReleaseColorSpace(pCSObj);
+  GetPageData()->ReleaseColorSpace(pCSObj);
 }
 
 void CPDF_Document::ClearPageData() {
   GetPageData()->Clear(FALSE);
 }
 
 void CPDF_Document::ClearRenderData() {
   m_pDocRender->Clear(FALSE);
 }
 
@@ skipping 654 matching lines @@
     }
   }
   pFontDesc->SetAtInteger("StemV", fStemV);
   AddIndirectObject(pFontDesc);
   pFontDict->SetAtReference("FontDescriptor", this, pFontDesc);
   CFRelease(traits);
   CFRelease(languages);
   return LoadFont(pBaseDict);
 }
 #endif  // _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_