hg: tiered-attrib/dev/langtools: add a root field to inference contexts that should point to the root of the inference context tree

[vicente.romero at oracle.com]

Changeset: 98de7109d80b
Author:    vromero
Date:      2015-06-30 18:10 -0700
URL:       http://hg.openjdk.java.net/tiered-attrib/dev/langtools/rev/98de7109d80b

add a root field to inference contexts that should point to the root of the inference context tree

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/InferenceContext.java