Remove use of stl_util's STLDeleteContainerPairSecondPointers from content/.

content/browser/child_process_security_policy_impl.h

Index: content/browser/child_process_security_policy_impl.h
diff --git a/content/browser/child_process_security_policy_impl.h b/content/browser/child_process_security_policy_impl.h
index 271e69c0acd110ed0e3d74f7b1d0c8512300973f..93c693e8a633a5aed5e0d6c43a698247009a995e 100644
--- a/content/browser/child_process_security_policy_impl.h
+++ b/content/browser/child_process_security_policy_impl.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_
 
 #include <map>
+#include <memory>
 #include <set>
 #include <string>
 #include <vector>
@@ -174,7 +175,7 @@ class CONTENT_EXPORT ChildProcessSecurityPolicyImpl
   class SecurityState;
 
   typedef std::set<std::string> SchemeSet;
-  typedef std::map<int, SecurityState*> SecurityStateMap;
+  typedef std::map<int, std::unique_ptr<SecurityState>> SecurityStateMap;
   typedef std::map<int, int> WorkerToMainProcessMap;
   typedef std::map<storage::FileSystemType, int> FileSystemPermissionPolicyMap;