Avoid RetainPtr<Retainable>::As<CFX_TextUserData>() calls.

CFX_Char::m_pUserData always holds only one type of object, so
specify it directly and avoid casting via As<>()

Change-Id: Ifd193d94c3fb68ef350a7735d7ecd43eb7f3e64e
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/62770
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

xfa/fgas/layout/cfx_char.h

diff --git a/xfa/fgas/layout/cfx_char.h b/xfa/fgas/layout/cfx_char.h
index ffd80ad..c4bafcc 100644
--- a/xfa/fgas/layout/cfx_char.h
+++ b/xfa/fgas/layout/cfx_char.h
@@ -13,6 +13,7 @@
 
 #include "core/fxcrt/fx_unicode.h"
 #include "core/fxcrt/retain_ptr.h"
+#include "xfa/fgas/layout/cfx_textuserdata.h"
 #include "xfa/fgas/layout/fx_linebreak.h"
 
 enum class CFX_BreakType : uint8_t { None = 0, Piece, Line, Paragraph, Page };
@@ -44,7 +45,7 @@
   uint16_t m_iBidiOrder = 0;
   int32_t m_iFontSize = 0;
   uint32_t m_dwIdentity = 0;
-  RetainPtr<Retainable> m_pUserData;
+  RetainPtr<CFX_TextUserData> m_pUserData;
 
  private:
   uint16_t m_wCharCode;

xfa/fgas/layout/cfx_rtfbreak.cpp

diff --git a/xfa/fgas/layout/cfx_rtfbreak.cpp b/xfa/fgas/layout/cfx_rtfbreak.cpp
index 72191ce..87740d5 100644
--- a/xfa/fgas/layout/cfx_rtfbreak.cpp
+++ b/xfa/fgas/layout/cfx_rtfbreak.cpp
@@ -395,7 +395,7 @@
       tp.m_iVerticalScale = pTC->vertical_scale();
       dwIdentity = pTC->m_dwIdentity;
       tp.m_dwIdentity = dwIdentity;
-      tp.m_pUserData = pTC->m_pUserData.As<CFX_TextUserData>();
+      tp.m_pUserData = pTC->m_pUserData;
       j = i;
       bNew = false;
     }
@@ -468,7 +468,7 @@
       tp.m_iVerticalScale = pTC->vertical_scale();
       dwIdentity = pTC->m_dwIdentity;
       tp.m_dwIdentity = dwIdentity;
-      tp.m_pUserData = pTC->m_pUserData.As<CFX_TextUserData>();
+      tp.m_pUserData = pTC->m_pUserData;
       tp.m_dwStatus = CFX_BreakType::Piece;
       ++i;
     } else if (iBidiLevel != pTC->m_iBidiLevel ||