Bug 901706: update IPeerConnectionObserver UUID r=ekr ba=bajaj
Bug 901707: update IPeerConnection UUID r=ekr ba=bajaj
No Bug - Guard PJS tests to only apply to Nightly. (a=test-only)
Bug 899857 - Make xpcshell default to a plugins directory only if -p is not specified. r=ted, a=test-only
Bug 901682.  Rev the IID for nsXMLHttpRequest.  r=gavin, a=bajaj