[UseZoomForDSF] Support drag&drop

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index 4f3db28fbd3e16275c50b76b718866b6735cb292..1768cfc30a195d695819d657c9db7241150a070b 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -355,6 +355,9 @@ class CONTENT_EXPORT RenderViewHostImpl : public RenderViewHost,
   // files without the user's consent.
   void GrantFileAccessFromPageState(const PageState& validated_state);
 
+  // Convers the dip to viewport coordinates.

[dcheng, 2016/01/26 18:52:15]

Nit:
Converts a point from DIPs to viewport coordinates
  or
just remove it (the comment is pretty obvious from the function signature)
  or
link to explanation of difference between DIPs and viewport coordinates.

+  gfx::Point ConvertDIPToViewport(const gfx::Point& point);
+
   // The RenderWidgetHost.
   scoped_ptr<RenderWidgetHostImpl> render_widget_host_;