hg: jdk/jdk11: 8207960: Non-negative WINDOW_UPDATE increments may leave the stream window size negative

[chris.hegarty at oracle.com]

Changeset: ad1fa1db73d9
Author:    chegar
Date:      2018-07-24 10:07 +0100
URL:       http://hg.openjdk.java.net/jdk/jdk11/rev/ad1fa1db73d9

8207960: Non-negative WINDOW_UPDATE increments may leave the stream window size negative
Reviewed-by: michaelm

! src/java.net.http/share/classes/jdk/internal/net/http/WindowController.java
+ test/jdk/java/net/httpclient/whitebox/WindowControllerTestDriver.java
+ test/jdk/java/net/httpclient/whitebox/java.net.http/jdk/internal/net/http/WindowControllerTest.java