Clean up singleton implementation

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/fpdf_parser/include/cpdf_document.h"
@@ skipping 39 matching lines @@
 class PDFDocTest : public testing::Test {
  public:
   struct DictObjInfo {
     uint32_t num;
     CPDF_Dictionary* obj;
   };
 
   void SetUp() override {
     // We don't need page module or render module, but
     // initialize them to keep the code sane.
-    CPDF_ModuleMgr::Create();
     CPDF_ModuleMgr* module_mgr = CPDF_ModuleMgr::Get();
     module_mgr->InitPageModule();
 
     m_pDoc.reset(new CPDF_TestPdfDocument());
     m_pIndirectObjs = m_pDoc->GetHolder();
     // Setup the root directory.
     m_pRootObj.reset(new CPDF_Dictionary());
     m_pDoc->SetRoot(m_pRootObj.get());
   }
 
@@ skipping 154 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()));
   }
 }