Import upstream change: java.net.URLClassLoader.findClass uses exceptions in control flow

Upstream change:

    8057936: java.net.URLClassLoader.findClass uses exceptions in control flow
    Reviewed-by: alanb, chegar, dholmes, mr
    Contributed-by: claes.redestad@oracle.com

    http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/496893f26d3d

Bug: 29067535
Change-Id: If21be35005127fa4e813ab6e3e55740cf160274c
Test: libcore.java.net.OldURLClassLoaderTest#testFindClass
2 files changed