Remove a use of stl_util in policy.

components/policy/core/common/cloud/external_policy_data_fetcher.h

Index: components/policy/core/common/cloud/external_policy_data_fetcher.h
diff --git a/components/policy/core/common/cloud/external_policy_data_fetcher.h b/components/policy/core/common/cloud/external_policy_data_fetcher.h
index be37dd869921700ae459c991dea5bd23ec36159f..a54261d1587c6409e88e4b79a2123ed7f2007679 100644
--- a/components/policy/core/common/cloud/external_policy_data_fetcher.h
+++ b/components/policy/core/common/cloud/external_policy_data_fetcher.h
@@ -174,8 +174,8 @@ class POLICY_EXPORT ExternalPolicyDataFetcherBackend
 
   // Map that owns the net::URLFetchers for all currently running jobs and maps
   // from these to the corresponding Job.
-  typedef std::map<net::URLFetcher*, ExternalPolicyDataFetcher::Job*> JobMap;
-  JobMap job_map_;
+  struct FetcherAndJob;
+  std::map<const net::URLFetcher*, FetcherAndJob> job_map_;
 
   base::WeakPtrFactory<ExternalPolicyDataFetcherBackend> weak_factory_;