Revert "Make CPDF_Document cache CPDF_Pages"

This reverts commit f0d9d28a034fe3650c3c2d662090c1e8687ddb16.

Reason for revert: avoid parsing page.

Change-Id: Id3478f7e38f1cbe95d098e00158b1d7d9dc6f76e
Reviewed-on: https://pdfium-review.googlesource.com/33750
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

2 files changed, 1 insertions, 22 deletions

diff --git a/core/fpdfapi/parser/cpdf_document.cpp b/core/fpdfapi/parser/cpdf_document.cpp
index 412f726eca..995d7edaf9 100644
--- a/core/fpdfapi/parser/cpdf_document.cpp
+++ b/core/fpdfapi/parser/cpdf_document.cpp
@@ -602,19 +602,6 @@ bool CPDF_Document::InsertNewPage(int iPage, CPDF_Dictionary* pPageDict) {
   return true;
 }
 
-RetainPtr<CPDF_Page> CPDF_Document::GetOrCreatePDFPage(
-    CPDF_Dictionary* pPageDict) {
-  std::pair<uint32_t, uint32_t> key = {pPageDict->GetObjNum(),
-                                       pPageDict->GetGenNum()};
-  if (m_PageMap[key])
-    return RetainPtr<CPDF_Page>(m_PageMap[key].Get());
-
-  auto pPage = pdfium::MakeRetain<CPDF_Page>(this, pPageDict, true);
-  pPage->ParseContent();
-  m_PageMap[key].Reset(pPage.Get());
-  return pPage;
-}
-
 void CPDF_Document::DeletePage(int iPage) {
   CPDF_Dictionary* pPages = GetPagesDict();
   if (!pPages)
diff --git a/core/fpdfapi/parser/cpdf_document.h b/core/fpdfapi/parser/cpdf_document.h
index c096e89e28..fe3f170114 100644
--- a/core/fpdfapi/parser/cpdf_document.h
+++ b/core/fpdfapi/parser/cpdf_document.h
@@ -8,7 +8,6 @@
 #define CORE_FPDFAPI_PARSER_CPDF_DOCUMENT_H_
 
 #include <functional>
-#include <map>
 #include <memory>
 #include <set>
 #include <utility>
@@ -67,7 +66,6 @@ class CPDF_Document : public CPDF_IndirectObjectHolder {
   const CPDF_Dictionary* GetInfo() const { return m_pInfoDict.Get(); }
   CPDF_Dictionary* GetInfo() { return m_pInfoDict.Get(); }
 
-  RetainPtr<CPDF_Page> GetOrCreatePDFPage(CPDF_Dictionary* pPageDict);
   void DeletePage(int iPage);
   int GetPageCount() const;
   bool IsPageLoaded(int iPage) const;
@@ -171,13 +169,7 @@ class CPDF_Document : public CPDF_IndirectObjectHolder {
   std::unique_ptr<CPDF_DocRenderData> m_pDocRender;
   std::unique_ptr<JBig2_DocumentContext> m_pCodecContext;
   std::unique_ptr<CPDF_LinkList> m_pLinksContext;
-
-  // Page number (index) to page's dict objnum.
-  std::vector<uint32_t> m_PageList;
-
-  // Dict {objnum, gennum} to page mapping.
-  std::map<std::pair<uint32_t, uint32_t>, CPDF_Page::ObservedPtr> m_PageMap;
-
+  std::vector<uint32_t> m_PageList;  // Page number to page's dict objnum.
   std::unique_ptr<Extension> m_pExtension;
 };