json.h include different header files depending on WEBRTC_CHROMIUM_BUILD being defined or not. Since json.h/cc is not even used in chromium it is the wrong flag to use. Instead add WEBRTC_EXTERNAL define. Also added OWNERS for base which is a copy of system_wrappers owners as the two folders are being merged.

BUG=3379
R=niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15779004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6421 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/base/OWNERS b/webrtc/base/OWNERS
new file mode 100644
index 0000000..4091a93
--- /dev/null
+++ b/webrtc/base/OWNERS
@@ -0,0 +1,7 @@
+henrike@webrtc.org
+pwestin@webrtc.org
+perkj@webrtc.org
+henrika@webrtc.org
+henrikg@webrtc.org
+mflodman@webrtc.org
+niklas.enbom@webrtc.org
\ No newline at end of file
diff --git a/webrtc/base/json.h b/webrtc/base/json.h
index fe41ac8..a8f76be 100644
--- a/webrtc/base/json.h
+++ b/webrtc/base/json.h
@@ -14,7 +14,7 @@
 #include <string>
 #include <vector>
 
-#if !defined(WEBRTC_CHROMIUM_BUILD)
+#if !defined(WEBRTC_EXTERNAL)
 #include "json/json.h"
 #else
 #include "third_party/jsoncpp/json.h"