Rename CPDF_PageObjectHolder::GetFormDict() to GetDict().

Renamed the underlying member m_pFormDict as well.

These names are misleading, as a page also uses the same field as
the page dict.

Change-Id: I52e0f1864a917a1e1b863725cb0d4f22faecacb3
Reviewed-on: https://pdfium-review.googlesource.com/34450
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
diff --git a/fpdfsdk/fpdf_editpage.cpp b/fpdfsdk/fpdf_editpage.cpp
index 094349f..0a8a745 100644
--- a/fpdfsdk/fpdf_editpage.cpp
+++ b/fpdfsdk/fpdf_editpage.cpp
@@ -58,7 +58,7 @@
   if (!pPage)
     return false;
 
-  const CPDF_Dictionary* pFormDict = pPage->GetFormDict();
+  const CPDF_Dictionary* pFormDict = pPage->GetDict();
   if (!pFormDict || !pFormDict->KeyExist("Type"))
     return false;
 
@@ -492,7 +492,7 @@
     return;
 
   rotate %= 4;
-  pPage->GetFormDict()->SetNewFor<CPDF_Number>("Rotate", rotate * 90);
+  pPage->GetDict()->SetNewFor<CPDF_Number>("Rotate", rotate * 90);
 }
 
 FPDF_BOOL FPDFPageObj_SetFillColor(FPDF_PAGEOBJECT page_object,