extensions: Use stl utilities from the base namespace

extensions/browser/event_router.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.
 
 #include "extensions/browser/event_router.h"
 
 #include <stddef.h>
 
 #include <tuple>
 #include <utility>
@@ skipping 485 matching lines @@
       }
     }
   }
 
   for (const EventListener* listener : listeners) {
     if (restrict_to_extension_id.empty() ||
         restrict_to_extension_id == listener->extension_id()) {
       if (listener->process()) {
         EventDispatchIdentifier dispatch_id(listener->GetBrowserContext(),
                                             listener->extension_id());
-        if (!ContainsKey(already_dispatched, dispatch_id)) {
+        if (!base::ContainsKey(already_dispatched, dispatch_id)) {
           DispatchEventToProcess(listener->extension_id(),
                                  listener->listener_url(), listener->process(),
                                  event, listener->filter(),
                                  false /* did_enqueue */);
         }
       }
     }
   }
 }
 
@@ skipping 376 matching lines @@
                                      const std::string& extension_id,
                                      const GURL& listener_url,
                                      content::BrowserContext* browser_context)
     : event_name(event_name),
       extension_id(extension_id),
       listener_url(listener_url),
       browser_context(browser_context) {
 }
 
 }  // namespace extensions