Prepare for removing some dead scrolling paths

content/renderer/pepper/pepper_plugin_instance_impl.cc

Index: content/renderer/pepper/pepper_plugin_instance_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.cc b/content/renderer/pepper/pepper_plugin_instance_impl.cc
index 4aaad86e0dbf7002b1f6b76917348e1bcdd94e16..c12c99f778c25483f8386129a2863ee691cfebf5 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.cc
@@ -756,7 +756,11 @@ void PepperPluginInstanceImpl::ScrollRect(int dx,
     fullscreen_container_->ScrollRect(dx, dy, rect);
   } else {
     if (full_frame_ && !IsViewAccelerated()) {
+#ifdef SCROLL_RECT_REQUIRES_NO_DELTA
+      container_->scrollRect(rect);
+#else
       container_->scrollRect(dx, dy, rect);
+#endif
     } else {
       // Can't do optimized scrolling since there could be other elements on top
       // of us or the view renders via the accelerated compositor which is