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diff --git a/xpcom/components/nsIServiceManager.idl b/xpcom/components/nsIServiceManager.idl
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+++ b/xpcom/components/nsIServiceManager.idl
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+#include "nsISupports.idl"
+
+/**
+ * The nsIServiceManager manager interface provides a means to obtain
+ * global services in an application. The service manager depends on the
+ * repository to find and instantiate factories to obtain services.
+ *
+ * Users of the service manager must first obtain a pointer to the global
+ * service manager by calling NS_GetServiceManager. After that,
+ * they can request specific services by calling GetService. When they are
+ * finished they can NS_RELEASE() the service as usual.
+ *
+ * A user of a service may keep references to particular services indefinitely
+ * and only must call Release when it shuts down.
+ */
+
+[builtinclass, scriptable, uuid(8bb35ed9-e332-462d-9155-4a002ab5c958)]
+interface nsIServiceManager : nsISupports
+{
+    /**
+     * getServiceByContractID
+     *
+     * Returns the instance that implements aClass or aContractID and the
+     * interface aIID.  This may result in the instance being created.
+     *
+     * @param aClass or aContractID : aClass or aContractID of object
+     *                                instance requested
+     * @param aIID : IID of interface requested
+     * @param result : resulting service
+     */
+    void getService(in nsCIDRef aClass,
+                    in nsIIDRef aIID,
+                    [iid_is(aIID),retval] out nsQIResult result);
+
+    void getServiceByContractID(in string aContractID,
+                                in nsIIDRef aIID,
+                                [iid_is(aIID),retval] out nsQIResult result);
+
+    /**
+     * isServiceInstantiated
+     *
+     * isServiceInstantiated will return a true if the service has already
+     * been created, or false otherwise. Throws if the service does not
+     * implement the given IID.
+     *
+     * @param aClass or aContractID : aClass or aContractID of object
+     *                                instance requested
+     * @param aIID : IID of interface requested
+     * @throws NS_NOINTERFACE if the IID given isn't supported by the object
+     */
+    boolean isServiceInstantiated(in nsCIDRef aClass, in nsIIDRef aIID);
+    boolean isServiceInstantiatedByContractID(in string aContractID, in nsIIDRef aIID);
+};
+
+
+%{C++
+// Observing xpcom autoregistration.  Topics will be 'start' and 'stop'.
+#define NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID "xpcom-autoregistration"
+
+#ifdef MOZILLA_INTERNAL_API
+#include "nsXPCOM.h"
+#include "nsComponentManagerUtils.h"
+#include "nsServiceManagerUtils.h"
+#endif
+%}