Prepare for removing some dead scrolling paths

content/renderer/render_widget_fullscreen_pepper.cc

Index: content/renderer/render_widget_fullscreen_pepper.cc
diff --git a/content/renderer/render_widget_fullscreen_pepper.cc b/content/renderer/render_widget_fullscreen_pepper.cc
index 2fa031478160412432af6b04e09d390d3fbc4be7..258775d90a9925f6a6682b85852cbc9ccb7d7789 100644
--- a/content/renderer/render_widget_fullscreen_pepper.cc
+++ b/content/renderer/render_widget_fullscreen_pepper.cc
@@ -300,7 +300,10 @@ void RenderWidgetFullscreenPepper::InvalidateRect(const blink::WebRect& rect) {
 
 void RenderWidgetFullscreenPepper::ScrollRect(
     int dx, int dy, const blink::WebRect& rect) {
+#ifdef DID_SCROLL_RECT_DOES_NOT_EXIST
+#else
   didScrollRect(dx, dy, rect);
+#endif
 }
 
 void RenderWidgetFullscreenPepper::Destroy() {