Return const-ref object in a few CPWL_Wnd getters.

fpdfsdk/src/pdfwindow/PWL_Wnd.cpp

Index: fpdfsdk/src/pdfwindow/PWL_Wnd.cpp
diff --git a/fpdfsdk/src/pdfwindow/PWL_Wnd.cpp b/fpdfsdk/src/pdfwindow/PWL_Wnd.cpp
index 5bedad127a3375cace5fc837d79eba96dd9d777d..d0aaa78ea48fca4be139e731480b0ceaf44099e4 100644
--- a/fpdfsdk/src/pdfwindow/PWL_Wnd.cpp
+++ b/fpdfsdk/src/pdfwindow/PWL_Wnd.cpp
@@ -302,14 +302,6 @@ void CPWL_Wnd::InvalidateRectMove(const CPDF_Rect& rcOld,
   InvalidateRect(&rcUnion);
 }
 
-void CPWL_Wnd::GetAppearanceStream(CFX_ByteString& sAppStream) {
-  if (IsValid()) {
-    CFX_ByteTextBuf sTextBuf;
-    GetAppearanceStream(sTextBuf);
-    sAppStream += sTextBuf.GetByteString();
-  }
-}
-
 void CPWL_Wnd::GetAppearanceStream(CFX_ByteTextBuf& sAppStream) {
   if (IsValid() && IsVisible()) {
     GetThisAppearanceStream(sAppStream);
@@ -366,11 +358,11 @@ void CPWL_Wnd::DrawThisAppearance(CFX_RenderDevice* pDevice,
     }
 
     if (HasFlag(PWS_BORDER))
-      CPWL_Utils::DrawBorder(
-          pDevice, pUser2Device, rectWnd, (FX_FLOAT)GetBorderWidth(),
-          GetBorderColor(), GetBorderLeftTopColor(GetBorderStyle()),
-          GetBorderRightBottomColor(GetBorderStyle()), GetBorderStyle(),
-          GetBorderDash(), GetTransparency());
+      CPWL_Utils::DrawBorder(pDevice, pUser2Device, rectWnd,
+                             (FX_FLOAT)GetBorderWidth(), GetBorderColor(),
+                             GetBorderLeftTopColor(GetBorderStyle()),
+                             GetBorderRightBottomColor(GetBorderStyle()),
+                             GetBorderStyle(), GetTransparency());
   }
 }
 
@@ -528,7 +520,7 @@ FX_BOOL CPWL_Wnd::IsValid() const {
   return m_bCreated;
 }
 
-PWL_CREATEPARAM CPWL_Wnd::GetCreationParam() const {
+const PWL_CREATEPARAM& CPWL_Wnd::GetCreationParam() const {
   return m_sPrivateParam;
 }
 
@@ -536,10 +528,6 @@ CPWL_Wnd* CPWL_Wnd::GetParentWindow() const {
   return m_sPrivateParam.pParentWnd;
 }
 
-CPDF_Rect CPWL_Wnd::GetOriginWindowRect() const {
-  return m_sPrivateParam.rcRectWnd;
-}
-
 CPDF_Rect CPWL_Wnd::GetWindowRect() const {
   return m_rcWindow;
 }
@@ -561,15 +549,6 @@ CPDF_Point CPWL_Wnd::GetCenterPoint() const {
                     (rcClient.top + rcClient.bottom) * 0.5f);
 }
 
-CPDF_Rect CPWL_Wnd::GetClientCenterSquare() const {
-  return CPWL_Utils::GetCenterSquare(GetClientRect());
-}
-
-CPDF_Rect CPWL_Wnd::GetWindowCenterSquare() const {
-  return CPWL_Utils::GetCenterSquare(
-      CPWL_Utils::DeflateRect(GetWindowRect(), 0.1f));
-}
-
 FX_BOOL CPWL_Wnd::HasFlag(FX_DWORD dwFlags) const {
   return (m_sPrivateParam.dwFlags & dwFlags) != 0;
 }
@@ -626,11 +605,6 @@ int32_t CPWL_Wnd::GetInnerBorderWidth() const {
   return 0;
 }
 
-void CPWL_Wnd::SetBorderWidth(int32_t nBorderWidth) {
-  if (HasFlag(PWS_BORDER))
-    m_sPrivateParam.dwBorderWidth = nBorderWidth;
-}
-
 CPWL_Color CPWL_Wnd::GetBorderColor() const {
   if (HasFlag(PWS_BORDER))
     return m_sPrivateParam.sBorderColor;
@@ -638,12 +612,7 @@ CPWL_Color CPWL_Wnd::GetBorderColor() const {
   return CPWL_Color();
 }
 
-void CPWL_Wnd::SetBorderColor(const CPWL_Color& color) {
-  if (HasFlag(PWS_BORDER))
-    m_sPrivateParam.sBorderColor = color;
-}
-
-CPWL_Dash CPWL_Wnd::GetBorderDash() const {
+const CPWL_Dash& CPWL_Wnd::GetBorderDash() const {
   return m_sPrivateParam.sDash;
 }
 
@@ -651,11 +620,6 @@ void* CPWL_Wnd::GetAttachedData() const {
   return m_sPrivateParam.pAttachedData;
 }
 
-void CPWL_Wnd::SetBorderDash(const CPWL_Dash& sDash) {
-  if (HasFlag(PWS_BORDER))
-    m_sPrivateParam.sDash = sDash;
-}
-
 CPWL_ScrollBar* CPWL_Wnd::GetVScrollBar() const {
   if (HasFlag(PWS_VSCROLL))
     return m_pVScrollBar;
@@ -754,7 +718,7 @@ void CPWL_Wnd::SetClipRect(const CPDF_Rect& rect) {
   m_rcClip.Normalize();
 }
 
-CPDF_Rect CPWL_Wnd::GetClipRect() const {
+const CPDF_Rect& CPWL_Wnd::GetClipRect() const {
   return m_rcClip;
 }