Revert 6202 "Switch to using base/constructormagic.h and remove ..."

> Switch to using base/constructormagic.h and remove system_wrappers/interface/constructor_magic.h.
> 
> BUG=N/A
> R=andrew@webrtc.org
> 
> Review URL: https://webrtc-codereview.appspot.com/19519004

TBR=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/14579007

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6210 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/neteq4/sync_buffer.h b/webrtc/modules/audio_coding/neteq4/sync_buffer.h
index 8deb950..0659f19 100644
--- a/webrtc/modules/audio_coding/neteq4/sync_buffer.h
+++ b/webrtc/modules/audio_coding/neteq4/sync_buffer.h
@@ -11,8 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ4_SYNC_BUFFER_H_
 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ4_SYNC_BUFFER_H_
 
-#include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/audio_coding/neteq4/audio_multi_vector.h"
+#include "webrtc/system_wrappers/interface/constructor_magic.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {