hg: amber/amber: creating a new phase at TypeEnter for inferring permitted subtypes, plus additional code simplification

[vicente.romero at oracle.com]

Changeset: fcff15c119f1
Author:    vromero
Date:      2019-09-20 15:54 -0400
URL:       https://hg.openjdk.java.net/amber/amber/rev/fcff15c119f1

creating a new phase at TypeEnter for inferring permitted subtypes, plus additional code simplification

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TypeEnter.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/util/Dependencies.java