Revert "Workaround Mac align bug for observer_ and crit_."
Revert "Workaround Mac align bug for observer_ and crit_."

This reverts commit r8528 which should be safe after r8646.

BUG=
R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/40249004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8648}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 385b56666a6ea8841517efabecd0955f1279ad47

Alkalyne/webrtctrunk,krieger-od/webrtc,sippet/webrtc,jchavanton/webrtc,jchavanton/webrtc,aleonliao/webrtc-trunk,jchavanton/webrtc,Alkalyne/webrtctrunk,krieger-od/webrtc,aleonliao/webrtc-trunk,aleonliao/webrtc-trunk,krieger-od/webrtc,sippet/webrtc,jchavanton/webrtc,sippet/webrtc,Alkalyne/webrtctrunk,aleonliao/webrtc-trunk,krieger-od/webrtc,krieger-od/webrtc,jchavanton/webrtc,aleonliao/webrtc-trunk,sippet/webrtc,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,jchavanton/webrtc,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,sippet/webrtc,Alkalyne/webrtctrunk,krieger-od/webrtc,jchavanton/webrtc,sippet/webrtc,aleonliao/webrtc-trunk