Fixup naming of XFA graphics classes

These files were originally renamed thinking they'd move with the
colour class up to core/. It was decided that CPWL_Color was a better
core colour class the the xfa colour so these are being renamed back to
XFA based names to make it clear where they live.

Change-Id: Ie89f2306be0609add29bd445e719567e7b439211
Reviewed-on: https://pdfium-review.googlesource.com/7754
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
diff --git a/xfa/fwl/cfwl_combobox.cpp b/xfa/fwl/cfwl_combobox.cpp
index cdb4f81..acc72b0 100644
--- a/xfa/fwl/cfwl_combobox.cpp
+++ b/xfa/fwl/cfwl_combobox.cpp
@@ -125,7 +125,7 @@
   return CFWL_Widget::HitTest(point);
 }
 
-void CFWL_ComboBox::DrawWidget(CFX_Graphics* pGraphics,
+void CFWL_ComboBox::DrawWidget(CXFA_Graphics* pGraphics,
                                const CFX_Matrix* pMatrix) {
   if (m_pWidgetMgr->IsFormDisabled()) {
     DisForm_DrawWidget(pGraphics, pMatrix);
@@ -288,7 +288,7 @@
     m_pEdit->ModifyStylesEx(dwStylesExAdded, dwStylesExRemoved);
 }
 
-void CFWL_ComboBox::DrawStretchHandler(CFX_Graphics* pGraphics,
+void CFWL_ComboBox::DrawStretchHandler(CXFA_Graphics* pGraphics,
                                        const CFX_Matrix* pMatrix) {
   CFWL_ThemeBackground param;
   param.m_pGraphics = pGraphics;
@@ -615,7 +615,7 @@
   return FWL_WidgetHit::Unknown;
 }
 
-void CFWL_ComboBox::DisForm_DrawWidget(CFX_Graphics* pGraphics,
+void CFWL_ComboBox::DisForm_DrawWidget(CXFA_Graphics* pGraphics,
                                        const CFX_Matrix* pMatrix) {
   IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
   CFX_Matrix mtOrg;
@@ -756,7 +756,7 @@
   }
 }
 
-void CFWL_ComboBox::OnDrawWidget(CFX_Graphics* pGraphics,
+void CFWL_ComboBox::OnDrawWidget(CXFA_Graphics* pGraphics,
                                  const CFX_Matrix* pMatrix) {
   DrawWidget(pGraphics, pMatrix);
 }