Summary: Add classLoader to java/lang/Class instance for fast access
Reviewed-by: alanb, lfoltan, rriggs, vlivanov, twisti, mchung, jfranck, dholmes

Summary: Improve protection domain check in forName()
Reviewed-by: mchung, acorn, jdn

Reviewed-by: mchung, ahgross, darcy

Summary: cache more reflective data and lookup results.
Reviewed-by: alanb, plevart, psandoz, dl
Contributed-by: NDoug Lea &lt;dl@cs.oswego.edu&gt;, Aleksey Shipilev <aleksey.shipilev@oracle.com>

Summary: setProtectionDomain0 and JVM_SetProtectionDomain are unused since at least 1.5.  This is the JDK side of a changeset to remove it.
Reviewed-by: alanb

Reviewed-by: darcy

Reviewed-by: xdono

Reviewed-by: andrew, mchung, ohair

Reviewed-by: darcy, weijun