Remove CPDF_Object::Release() in favor of direct delete

fpdfsdk/fpdfdoc_unittest.cpp

 // Copyright 2016 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.
 
 #include "public/fpdf_doc.h"
 
 #include <memory>
 #include <vector>
 
 #include "core/fpdfapi/cpdf_modulemgr.h"
@@ skipping 70 matching lines @@
       // Objects created will be released by the document.
       CPDF_Dictionary* obj = new CPDF_Dictionary();
       info.push_back({m_pIndirectObjs->AddIndirectObject(obj), obj});
     }
     return info;
   }
 
  protected:
   std::unique_ptr<CPDF_TestPdfDocument> m_pDoc;
   CPDF_IndirectObjectHolder* m_pIndirectObjs;
-  std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> m_pRootObj;
+  std::unique_ptr<CPDF_Dictionary> m_pRootObj;
 };
 
 TEST_F(PDFDocTest, FindBookmark) {
   {
     // No bookmark information.
     std::unique_ptr<unsigned short, pdfium::FreeDeleter> title =
         GetFPDFWideString(L"");
     EXPECT_EQ(nullptr, FPDFBookmark_Find(m_pDoc.get(), title.get()));
 
     title = GetFPDFWideString(L"Preface");
@@ skipping 122 matching lines @@
     // Title with no match.
     std::unique_ptr<unsigned short, pdfium::FreeDeleter> title =
         GetFPDFWideString(L"Chapter 8");
     EXPECT_EQ(nullptr, FPDFBookmark_Find(m_pDoc.get(), title.get()));
 
     // Title with a match.
     title = GetFPDFWideString(L"Chapter 3");
     EXPECT_EQ(bookmarks[3].obj, FPDFBookmark_Find(m_pDoc.get(), title.get()));
   }
 }