Change mojo geometry structs from using type converters to StructTraits.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 3edf76f98cc77090548d8ee3f6a010ba693253c3..9dc29f91d8318c395059e7a27c3e81018ce8c76f 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -865,7 +865,7 @@ class CONTENT_EXPORT WebContentsImpl
                           const GURL& image_url,
                           int32_t http_status_code,
                           mojo::Array<skia::mojom::BitmapPtr> images,
-                          mojo::Array<mojo::SizePtr> original_image_sizes);
+                          mojo::Array<gfx::Size> original_image_sizes);
 
   // Callback function when showing JavaScript dialogs.  Takes in a routing ID
   // pair to identify the RenderFrameHost that opened the dialog, because it's