Convert the preferred size from Viewport coordinates to Window coordinates

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 9aa953a0ee82829276c7f222a84244e65504a0e5..50d6749b139a644e5db4d6cd5512549954529876 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1880,8 +1880,10 @@ void RenderViewImpl::CheckPreferredSize() {
   // message.
   if (!send_preferred_size_changes_ || !webview())
     return;
-
-  gfx::Size size = webview()->ContentsPreferredMinimumSize();
+  blink::WebSize tmp_size = webview()->ContentsPreferredMinimumSize();
+  blink::WebRect tmp_rect(0, 0, tmp_size.width, tmp_size.height);
+  ConvertViewportToWindow(&tmp_rect);
+  gfx::Size size(tmp_rect.width, tmp_rect.height);
   if (size == preferred_size_)
     return;