Lazy-creates BluetoothAdapter in ExtensionBluetoothEventRouter (EBEE).

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 2cac53556bb96cb05ce2aed8ddfb89b9d83c695b..277092748938e76cbe966855cae397f3a040e881 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -211,6 +211,16 @@ class ExtensionService
   // initiative.
   const ExtensionSet* GetWipedOutExtensions() const;
 
+  // Notifies the extension event routers that are interested in knowing when
+  // the event listeners are added.
+  void NotifyExtensionEventRoutersOnListenerAdded(
+      const std::string& event_name);
+
+  // Notifies the extension event routers that are interested in knowing when
+  // the event listeners are removed.
+  void NotifyExtensionEventRoutersOnListenerRemoved(
+      const std::string& event_name);
+
   // Gets the object managing the set of pending extensions.
   virtual extensions::PendingExtensionManager*
       pending_extension_manager() OVERRIDE;