net: Use stl utilities from the base namespace

net/url_request/url_fetcher_core.cc

Index: net/url_request/url_fetcher_core.cc
diff --git a/net/url_request/url_fetcher_core.cc b/net/url_request/url_fetcher_core.cc
index 0f75e6789c0ce5173b1a372fe8b104c4f366b5c3..3d49ad233d242badf58232f4f1897b3740ef2330 100644
--- a/net/url_request/url_fetcher_core.cc
+++ b/net/url_request/url_fetcher_core.cc
@@ -50,12 +50,12 @@ URLFetcherCore::Registry::Registry() {}
 URLFetcherCore::Registry::~Registry() {}
 
 void URLFetcherCore::Registry::AddURLFetcherCore(URLFetcherCore* core) {
-  DCHECK(!ContainsKey(fetchers_, core));
+  DCHECK(!base::ContainsKey(fetchers_, core));
   fetchers_.insert(core);
 }
 
 void URLFetcherCore::Registry::RemoveURLFetcherCore(URLFetcherCore* core) {
-  DCHECK(ContainsKey(fetchers_, core));
+  DCHECK(base::ContainsKey(fetchers_, core));
   fetchers_.erase(core);
 }