Drag image should always use the real device scale factor

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 3990452b0666a0bd22aa739ca90634f16634cc19..86975cf586e438bf006c5aed9bee86383762eb45 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -2244,6 +2244,10 @@ blink::WebString RenderViewImpl::acceptLanguages() {
   return WebString::fromUTF8(renderer_preferences_.accept_languages);
 }
 
+float RenderViewImpl::nonEmulatedDeviceScaleFactor() {
+  return GetOriginalDeviceScaleFactor();
+}
+
 // RenderView implementation ---------------------------------------------------
 
 bool RenderViewImpl::Send(IPC::Message* message) {