--- a/js/src/jsfriendapi.cpp
+++ b/js/src/jsfriendapi.cpp
@@ -749,22 +749,16 @@ js::CallContextDebugHandler(JSContext *c
     if (!cx->runtime->debugHooks.debuggerHandler)
         return JSTRAP_RETURN;
 
     return cx->runtime->debugHooks.debuggerHandler(cx, script, bc, rval,
                                                    cx->runtime->debugHooks.debuggerHandlerData);
 }
 
 #ifdef JS_THREADSAFE
-void *
-js::GetOwnerThread(const JSContext *cx)
-{
-    return cx->runtime->ownerThread();
-}
-
 JS_FRIEND_API(bool)
 js::ContextHasOutstandingRequests(const JSContext *cx)
 {
     return cx->outstandingRequests > 0;
 }
 #endif
 
 JS_FRIEND_API(bool)

--- a/js/src/jsfriendapi.h
+++ b/js/src/jsfriendapi.h
@@ -718,19 +718,16 @@ SetRuntimeProfilingStack(JSRuntime *rt, 
 
 JS_FRIEND_API(void)
 EnableRuntimeProfilingStack(JSRuntime *rt, bool enabled);
 
 JS_FRIEND_API(jsbytecode*)
 ProfilingGetPC(JSRuntime *rt, JSScript *script, void *ip);
 
 #ifdef JS_THREADSAFE
-JS_FRIEND_API(void *)
-GetOwnerThread(const JSContext *cx);
-
 JS_FRIEND_API(bool)
 ContextHasOutstandingRequests(const JSContext *cx);
 #endif
 
 JS_FRIEND_API(bool)
 HasUnrootedGlobal(const JSContext *cx);
 
 typedef void