aura: Fix external texture layers when scaling up

ui/compositor/layer.cc

Index: ui/compositor/layer.cc
diff --git a/ui/compositor/layer.cc b/ui/compositor/layer.cc
index e4de7b364b82b8c5c609d1a0c3e50e7ed6588a80..206ac8e5d42fe5b0c56e17a33d23641a0e71b489 100644
--- a/ui/compositor/layer.cc
+++ b/ui/compositor/layer.cc
@@ -602,7 +602,7 @@ void Layer::RecomputeDrawsContentAndUVRect() {
         static_cast<float>(size.height())/texture_size.height());
     texture_layer.setUVRect(rect);
 
-    gfx::Size size_in_pixel = ConvertSizeToPixel(this, bounds().size());
+    gfx::Size size_in_pixel = ConvertSizeToPixel(this, size);
     web_layer_.setBounds(size_in_pixel);
   }
 }