content/chromeos: Fix WebKit software rendering in high-device-scale-factors.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 570a6ea97a2ea5d36bbdd8a92e30ec872bb345cd..687260ed9942320b0e6d02a56e84a2306e752a64 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -524,6 +524,10 @@ class CONTENT_EXPORT RenderWidget
   // Properties of the screen hosting this RenderWidget instance.
   WebKit::WebScreenInfo screen_info_;
 
+  // The device scale factor. This value is computed from the DPI entries in
+  // |screen_info_| on some platforms, and defaults to 1 on other platforms.
+  int device_scale_factor_;
+
   // Set to true if we should invert all pixels.
   bool invert_;