content: Use stl utilities from the base namespace

content/browser/loader/resource_dispatcher_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <stddef.h>
 
@@ skipping 2541 matching lines @@
                            std::make_pair(
                                id,
                                new base::ObserverList<ResourceMessageDelegate>))
              .first;
   }
   it->second->AddObserver(delegate);
 }
 
 void ResourceDispatcherHostImpl::UnregisterResourceMessageDelegate(
     const GlobalRequestID& id, ResourceMessageDelegate* delegate) {
-  DCHECK(ContainsKey(delegate_map_, id));
+  DCHECK(base::ContainsKey(delegate_map_, id));
   DelegateMap::iterator it = delegate_map_.find(id);
   DCHECK(it->second->HasObserver(delegate));
   it->second->RemoveObserver(delegate);
   if (!it->second->might_have_observers()) {
     delete it->second;
     delegate_map_.erase(it);
   }
 }
 
 int ResourceDispatcherHostImpl::BuildLoadFlagsForRequest(
@@ skipping 95 matching lines @@
                        << iter->filesystem_url().spec();
           return false;
         }
       }
     }
   }
   return true;
 }
 
 }  // namespace content