Backout change b371db089894 (bug 1138620) due to backout of bug 970307.

xpcom/threads/nsIThreadManager.idl

@@ -13,7 +13,7 @@ interface nsIThread;
 /**
  * An interface for creating and locating nsIThread instances.
  */
-[scriptable, uuid(04092259-4498-4c82-ac52-f9225eb114d0)]
+[scriptable, uuid(1be89eca-e2f7-453b-8d38-c11ba247f6f3)]
 interface nsIThreadManager : nsISupports
 {
   /**
@@ -65,11 +65,4 @@ interface nsIThreadManager : nsISupports
    * application process.
    */
   readonly attribute boolean isMainThread;
-
-  /**
-   * Informs the thread manager to not monitor the status of the current thread.
-   * This method only works on platforms with Nuwa enabled; on other platforms,
-   * it throws an error.
-   */
-  [noscript] void setIgnoreThreadStatus();
 };

xpcom/threads/nsThreadManager.cpp

@@ -430,18 +430,13 @@ nsThreadManager::GetHighestNumberOfThreads()
   return mHighestNumberOfThreads;
 }
 
-NS_IMETHODIMP
+#ifdef MOZ_NUWA_PROCESS
+void
 nsThreadManager::SetIgnoreThreadStatus()
 {
-#ifdef MOZ_NUWA_PROCESS
   GetCurrentThreadStatusInfo()->mIgnored = true;
-  return NS_OK;
-#else
-  return NS_ERROR_NOT_IMPLEMENTED;
-#endif
 }
 
-#ifdef MOZ_NUWA_PROCESS
 void
 nsThreadManager::SetThreadIdle(nsIRunnable **aReturnRunnable)
 {

xpcom/threads/nsThreadManager.h

@@ -72,6 +72,8 @@ public:
   }
 
 #ifdef MOZ_NUWA_PROCESS
+  void SetIgnoreThreadStatus();
+
   // |SetThreadWorking| and |SetThreadIdle| set status of thread that is
   // currently running. They get thread status information from TLS and pass
   // the information to |SetThreadIsWorking|.