Bug 1035394 - Fix dangerous public destructors in xpcom - r=khuey

xpcom/base/nsMemoryInfoDumper.cpp

@@ -117,6 +117,8 @@ public:
   }
 
 private:
+  ~GCAndCCLogDumpRunnable() {}
+
   const nsString mIdentifier;
   const bool mDumpAllTraces;
   const bool mDumpChildProcesses;