[DevTools] Set correct overlay size for scaled page.

Source/web/PageOverlay.cpp

Index: Source/web/PageOverlay.cpp
diff --git a/Source/web/PageOverlay.cpp b/Source/web/PageOverlay.cpp
index 676c2c3d98c1676897d1581c47d5300d466dddac..d713472d53969db306ac9c6ebbc26c63f5ba5109 100644
--- a/Source/web/PageOverlay.cpp
+++ b/Source/web/PageOverlay.cpp
@@ -90,7 +90,7 @@ void PageOverlay::update()
         page->frameHost().visualViewport().containerLayer()->addChild(m_layer.get());
     }
 
-    FloatSize size = page->frameHost().visualViewport().visibleSize();
+    FloatSize size = page->frameHost().visualViewport().size();
     if (size != m_layer->size())
         m_layer->setSize(size);