6978087: jsr166y Updates

Summary: Simplify the ForkJoinPool API, reworking some of the internals
Reviewed-by: martin, dholmes, chegar

jdk/src/share/classes/java/util/concurrent/Phaser.java

@@ -898,7 +898,7 @@ public class Phaser {
         boolean doWait() {
             if (thread != null) {
                 try {
-                    ForkJoinPool.managedBlock(this, false);
+                    ForkJoinPool.managedBlock(this);
                 } catch (InterruptedException ie) {
                 }
             }

jdk/test/java/util/concurrent/forkjoin/Integrate.java

@@ -206,7 +206,7 @@ public final class Integrate {
             q.fork();
             ar = recEval(c, r, fc, fr, ar);
             if (!q.tryUnfork()) {
-                q.quietlyHelpJoin();
+                q.quietlyJoin();
                 return ar + q.area;
             }
             return ar + recEval(l, c, fl, fc, al);
@@ -254,7 +254,7 @@ public final class Integrate {
                 (q = new DQuad(l, c, al)).fork();
             ar = recEval(c, r, fc, fr, ar);
             if (q != null && !q.tryUnfork()) {
-                q.quietlyHelpJoin();
+                q.quietlyJoin();
                 return ar + q.area;
             }
             return ar + recEval(l, c, fl, fc, al);