Switch to standard integer types in extensions/browser/.

extensions/browser/extension_host_observer.h

 // Copyright 2015 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.
 
 #ifndef EXTENSIONS_BROWSER_EXTENSION_HOST_OBSERVER_H_
 #define EXTENSIONS_BROWSER_EXTENSION_HOST_OBSERVER_H_
 
+#include <stdint.h>
+
 #include <string>
 
 namespace extensions {
 class ExtensionHost;
 
 class ExtensionHostObserver {
  public:
   virtual ~ExtensionHostObserver() {}
 
   // TODO(kalman): Why do these all return const ExtensionHosts? It seems
@@ skipping 10 matching lines @@
                                            int event_id) {}
 
   // Called when a previously dispatched message has been acked by the
   // event page for |host|.
   virtual void OnBackgroundEventAcked(const ExtensionHost* host, int event_id) {
   }
 
   // Called when the extension associated with |host| starts a new network
   // request.
   virtual void OnNetworkRequestStarted(const ExtensionHost* host,
-                                       uint64 request_id) {}
+                                       uint64_t request_id) {}
 
   // Called when the network request with |request_id| is done.
   virtual void OnNetworkRequestDone(const ExtensionHost* host,
-                                    uint64 request_id) {}
+                                    uint64_t request_id) {}
 };
 
 }  // namespace extensions
 
 #endif /* EXTENSIONS_BROWSER_EXTENSION_HOST_OBSERVER_H_ */