Revert of Unify some code

core/fpdfapi/parser/cpdf_linearized.cpp

Index: core/fpdfapi/parser/cpdf_linearized.cpp
diff --git a/core/fpdfapi/parser/cpdf_linearized.cpp b/core/fpdfapi/parser/cpdf_linearized.cpp
deleted file mode 100644
index aa0ef45bcc641692ee1a1981919ba363598674d0..0000000000000000000000000000000000000000
--- a/core/fpdfapi/parser/cpdf_linearized.cpp
+++ /dev/null
@@ -1,69 +0,0 @@
-// 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.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "core/fpdfapi/parser/cpdf_linearized.h"
-
-#include "core/fpdfapi/parser/cpdf_array.h"
-#include "core/fpdfapi/parser/cpdf_dictionary.h"
-#include "core/fpdfapi/parser/cpdf_number.h"
-#include "third_party/base/ptr_util.h"
-
-namespace {
-
-template <class T>
-bool IsValidNumericDictionaryValue(const CPDF_Dictionary* pDict,
-                                   const char* key,
-                                   T min_value,
-                                   bool must_exist = true) {
-  if (!pDict->KeyExist(key))
-    return !must_exist;
-  const CPDF_Number* pNum = ToNumber(pDict->GetObjectFor(key));
-  if (!pNum || !pNum->IsInteger())
-    return false;
-  const int raw_value = pNum->GetInteger();
-  if (!pdfium::base::IsValueInRangeForNumericType<T>(raw_value))
-    return false;
-  return static_cast<T>(raw_value) >= min_value;
-}
-
-}  // namespace
-
-// static
-std::unique_ptr<CPDF_Linearized> CPDF_Linearized::CreateForObject(
-    std::unique_ptr<CPDF_Object> pObj) {
-  auto pDict = ToDictionary(std::move(pObj));
-  if (!pDict || !pDict->KeyExist("Linearized") ||
-      !IsValidNumericDictionaryValue<FX_FILESIZE>(pDict.get(), "L", 1) ||
-      !IsValidNumericDictionaryValue<uint32_t>(pDict.get(), "P", 0, false) ||
-      !IsValidNumericDictionaryValue<FX_FILESIZE>(pDict.get(), "T", 1) ||
-      !IsValidNumericDictionaryValue<uint32_t>(pDict.get(), "N", 0) ||
-      !IsValidNumericDictionaryValue<FX_FILESIZE>(pDict.get(), "E", 1) ||
-      !IsValidNumericDictionaryValue<uint32_t>(pDict.get(), "O", 1))
-    return nullptr;
-  return pdfium::WrapUnique(new CPDF_Linearized(pDict.get()));
-}
-
-CPDF_Linearized::CPDF_Linearized(const CPDF_Dictionary* pDict) {
-  m_szFileSize = pDict->GetIntegerFor("L");
-  m_dwFirstPageNo = pDict->GetIntegerFor("P");
-  m_szLastXRefOffset = pDict->GetIntegerFor("T");
-  m_PageCount = pDict->GetIntegerFor("N");
-  m_szFirstPageEndOffset = pDict->GetIntegerFor("E");
-  m_FirstPageObjNum = pDict->GetIntegerFor("O");
-  const CPDF_Array* pHintStreamRange = pDict->GetArrayFor("H");
-  const size_t nHintStreamSize =
-      pHintStreamRange ? pHintStreamRange->GetCount() : 0;
-  if (nHintStreamSize == 2 || nHintStreamSize == 4) {
-    m_szHintStart = std::max(pHintStreamRange->GetIntegerAt(0), 0);
-    m_szHintLength = std::max(pHintStreamRange->GetIntegerAt(1), 0);
-  }
-}
-
-CPDF_Linearized::~CPDF_Linearized() {}
-
-bool CPDF_Linearized::HasHintTable() const {
-  return GetPageCount() > 1 && GetHintStart() > 0 && GetHintLength() > 0;
-}