Remove CFWL_Widget::GetRootOuter() and Repaint()

GetRootOuter() isn't called.
RepaintRect() form is used in place of Repaint().

Change-Id: I6a4ca4b79ec988976756d00d437e23e17c5e42e7
Reviewed-on: https://pdfium-review.googlesource.com/c/45876
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

xfa/fwl/cfwl_widget.cpp

diff --git a/xfa/fwl/cfwl_widget.cpp b/xfa/fwl/cfwl_widget.cpp
index 43489e7..ae42469 100644
--- a/xfa/fwl/cfwl_widget.cpp
+++ b/xfa/fwl/cfwl_widget.cpp
@@ -269,16 +269,6 @@
   return nullptr;
 }
 
-CFWL_Widget* CFWL_Widget::GetRootOuter() {
-  CFWL_Widget* pRet = m_pOuter;
-  if (!pRet)
-    return nullptr;
-
-  while (CFWL_Widget* pOuter = pRet->GetOuter())
-    pRet = pOuter;
-  return pRet;
-}
-
 CFX_SizeF CFWL_Widget::CalcTextSize(const WideString& wsText,
                                     IFWL_ThemeProvider* pTheme,
                                     bool bMultiLine) {
@@ -362,11 +352,6 @@
   pNoteDriver->SendEvent(pEvent);
 }
 
-void CFWL_Widget::Repaint() {
-  RepaintRect(CFX_RectF(0, 0, m_pProperties->m_rtWidget.width,
-                        m_pProperties->m_rtWidget.height));
-}
-
 void CFWL_Widget::RepaintRect(const CFX_RectF& pRect) {
   m_pWidgetMgr->RepaintWidget(this, pRect);
 }

xfa/fwl/cfwl_widget.h

diff --git a/xfa/fwl/cfwl_widget.h b/xfa/fwl/cfwl_widget.h
index 785c5fa9..6585adc 100644
--- a/xfa/fwl/cfwl_widget.h
+++ b/xfa/fwl/cfwl_widget.h
@@ -119,7 +119,6 @@
   void SetLayoutItem(CXFA_FFWidget* pItem) { m_pLayoutItem = pItem; }
 
   void RepaintRect(const CFX_RectF& pRect);
-  void Repaint();
 
  protected:
   CFWL_Widget(const CFWL_App* app,
@@ -160,7 +159,6 @@
  private:
   CFWL_Widget* GetParent() const { return m_pWidgetMgr->GetParentWidget(this); }
   CFX_SizeF GetOffsetFromParent(CFWL_Widget* pParent);
-  CFWL_Widget* GetRootOuter();
   void DrawBackground(CXFA_Graphics* pGraphics,
                       CFWL_Part iPartBk,
                       IFWL_ThemeProvider* pTheme,