hg: openjfx/9-dev/rt: 8154127: Need to document that JavaScript to Java bindings use weak references

[murali.billa at oracle.com]

Changeset: 978f6947b8f5
Author:    mbilla
Date:      2016-06-29 22:51 +0530
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/978f6947b8f5

8154127: Need to document that JavaScript to Java bindings use weak references
Reviewed-by: kcr

! modules/web/src/main/java/javafx/scene/web/WebEngine.java