Revert of [chrome_elf] Big cleanup and removing dependencies that recently crept in. Part 1.

chrome_elf/chrome_elf_security.cc

Index: chrome_elf/chrome_elf_security.cc
diff --git a/chrome_elf/chrome_elf_security.cc b/chrome_elf/chrome_elf_security.cc
index 2b3c8258ea2d53065639aef9f8f8315b4500b237..b1ddcd92ec847b5b8c52238228fa6fe5b9d092f7 100644
--- a/chrome_elf/chrome_elf_security.cc
+++ b/chrome_elf/chrome_elf_security.cc
@@ -10,8 +10,6 @@
 
 #include "chrome_elf/chrome_elf_constants.h"
 #include "chrome_elf/nt_registry/nt_registry.h"
-
-namespace elf_security {
 
 void EarlyBrowserSecurity() {
   typedef decltype(SetProcessMitigationPolicy)* SetProcessMitigationPolicyFunc;
@@ -49,4 +47,3 @@
   }
   return;
 }
-}  // namespace elf_security