Drag image should always use the real device scale factor

third_party/WebKit/public/web/WebViewClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 182 matching lines @@
     // After calling WebWidget::layout(), expect to get this notification
     // unless the view did not need a layout.
     virtual void didUpdateLayout() { }
 
     // Return true to swallow the input event if the embedder will start a disambiguation popup
     virtual bool didTapMultipleTargets(const WebSize& visualViewportOffset, const WebRect& touchRect, const WebVector<WebRect>& targetRects) { return false; }
 
     // Returns comma separated list of accept languages.
     virtual WebString acceptLanguages() { return WebString(); }
 
+    // Returns the acutal scale factor of the device even when emulated. Used for drag drop
+    // images that should use the real device scale factor even in dev tools.
+    virtual float nonEmulatedDeviceScaleFactor() { return 1.0f; }
 
     // Session history -----------------------------------------------------
 
     // Tells the embedder to navigate back or forward in session history by
     // the given offset (relative to the current position in session
     // history).
     virtual void navigateBackForwardSoon(int offset) { }
 
     // Returns the number of history items before/after the current
     // history item.
@@ skipping 91 matching lines @@
     WebRect windowRect() override { return WebRect(); }
     WebRect windowResizerRect() override { return WebRect(); }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace blink
 
 #endif