Revert "Add type cast definitions for CPDF_Dictionary."

This reverts commit 4816432671eef6467354aa252f22bb80acc315b7.

Reason, broke the javascript_test Rendering PDF file
/mnt/data/b/build/slave/linux/build/pdfium/out/Debug/gen/pdfium/testing/javascript/document_methods.pdf.
Non-linearized path...
FAILURE: document_methods.in; Command
'['/mnt/data/b/build/slave/linux/build/pdfium/out/Debug/pdfium_test',
'/mnt/data/b/build/slave/linux/build/pdfium/out/Debug/gen/pdfium/testing/javascript/document_methods.pdf']'
returned non-zero exit status -11

BUG=pdfium:201
TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1412413002 .

1 files changed, 8 insertions, 5 deletions

diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_document.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_document.cpp
index 29c1a007cf..2dff766187 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_document.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_document.cpp
@@ -143,15 +143,18 @@ CPDF_Dictionary* CPDF_Document::GetPage(int iPage) {
     return nullptr;
 
   if (m_bLinearized && (iPage == (int)m_dwFirstPageNo)) {
-    if (CPDF_Dictionary* pDict =
-            ToDictionary(GetIndirectObject(m_dwFirstPageObjNum)))
-      return pDict;
+    CPDF_Object* pObj = GetIndirectObject(m_dwFirstPageObjNum);
+    if (pObj && pObj->GetType() == PDFOBJ_DICTIONARY) {
+      return static_cast<CPDF_Dictionary*>(pObj);
+    }
   }
 
   int objnum = m_PageList.GetAt(iPage);
   if (objnum) {
-    if (CPDF_Dictionary* pDict = ToDictionary(GetIndirectObject(objnum)))
-      return pDict;
+    CPDF_Object* pObj = GetIndirectObject(objnum);
+    if (pObj && pObj->GetType() == PDFOBJ_DICTIONARY) {
+      return static_cast<CPDF_Dictionary*>(pObj);
+    }
   }
 
   CPDF_Dictionary* pRoot = GetRoot();