Minimal implementation of Widevine MediaCAS ECMG.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=226515998

common/status.h

@@ -14,7 +14,6 @@
 #include "util/error_space.h"
 
 namespace widevine {
-namespace util {
 namespace error {
 
 enum StatusCode {
@@ -104,7 +103,6 @@ std::ostream& operator<<(std::ostream& os, const Status& x);
 #define CHECK_OK(expression) CHECK(expression.ok()) << expression.ToString()
 
 
-}  // namespace util
 }  // namespace widevine
 
 #endif  // COMMON_STATUS_H_