Move PNM_SETSCROLLINFO out of OnNotify

This CL moves the SETSCROLLINFO from a OnNotify message to a method
which is called directly.

Change-Id: I5d793c1c7a54c0fa3bdadffac72aae934cb9da57
Reviewed-on: https://pdfium-review.googlesource.com/7251
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
diff --git a/fpdfsdk/pdfwindow/cpwl_wnd.cpp b/fpdfsdk/pdfwindow/cpwl_wnd.cpp
index e99d71b..8ac7d48 100644
--- a/fpdfsdk/pdfwindow/cpwl_wnd.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_wnd.cpp
@@ -427,6 +427,8 @@
                         intptr_t wParam,
                         intptr_t lParam) {}
 
+void CPWL_Wnd::SetScrollInfo(const PWL_SCROLL_INFO& info) {}
+
 bool CPWL_Wnd::IsValid() const {
   return m_bCreated;
 }