content: Use stl utilities from the base namespace

content/browser/service_worker/service_worker_provider_host.cc

Index: content/browser/service_worker/service_worker_provider_host.cc
diff --git a/content/browser/service_worker/service_worker_provider_host.cc b/content/browser/service_worker/service_worker_provider_host.cc
index fe9cd8b4e1dd91a850d1c936cd2c9a1f8b80d8e4..67b10a78ecc5f67db3558614ad66363396779441 100644
--- a/content/browser/service_worker/service_worker_provider_host.cc
+++ b/content/browser/service_worker/service_worker_provider_host.cc
@@ -289,7 +289,7 @@ void ServiceWorkerProviderHost::AddMatchingRegistration(
   if (!IsContextSecureForServiceWorker())
     return;
   size_t key = registration->pattern().spec().size();
-  if (ContainsKey(matching_registrations_, key))
+  if (base::ContainsKey(matching_registrations_, key))
     return;
   IncreaseProcessReference(registration->pattern());
   registration->AddListener(this);
@@ -300,7 +300,7 @@ void ServiceWorkerProviderHost::AddMatchingRegistration(
 void ServiceWorkerProviderHost::RemoveMatchingRegistration(
     ServiceWorkerRegistration* registration) {
   size_t key = registration->pattern().spec().size();
-  DCHECK(ContainsKey(matching_registrations_, key));
+  DCHECK(base::ContainsKey(matching_registrations_, key));
   DecreaseProcessReference(registration->pattern());
   registration->RemoveListener(this);
   matching_registrations_.erase(key);