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-Commit-Position: refs/heads/master@{#8648}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8648 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/video_engine/vie_capturer.cc b/webrtc/video_engine/vie_capturer.cc
index ce3b715..bd9d8a3 100644
--- a/webrtc/video_engine/vie_capturer.cc
+++ b/webrtc/video_engine/vie_capturer.cc
@@ -52,11 +52,8 @@
   }
 
  private:
-  // TODO(pbos): Figure out why observer_ needs to be declared above crit_ on
-  // Mac. tommi@ also ran into this while debugging weird critical-section
-  // related alignment issues. Pushing this as a workaround to unblock rolling.
-  CpuOveruseMetricsObserver* observer_ GUARDED_BY(crit_) = nullptr;
   mutable rtc::CriticalSection crit_;
+  CpuOveruseMetricsObserver* observer_ GUARDED_BY(crit_) = nullptr;
   CpuOveruseMetrics metrics_ GUARDED_BY(crit_);
 };