Bug 1434689 - Part 3: Annotate nsTSubstringTuple as MOZ_TEMPORARY_CLASS. r=froydnj

The documentation indicates nsTStringTuple is intended for internal use only
and is designed to be only be used as a temporary. This makes that fact
explicit by annotating the class for static analysis.

--HG--
extra : rebase_source : 737481fb39355c456cf1bbf17b887e35d692c4df

xpcom/string/nsTSubstringTuple.h

@@ -8,6 +8,7 @@
 #ifndef nsTSubstringTuple_h
 #define nsTSubstringTuple_h
 
+#include "mozilla/Attributes.h"
 #include "nsTStringRepr.h"
 
 /**
@@ -20,7 +21,7 @@
  * referenced outside the string code.
  */
 template <typename T>
-class nsTSubstringTuple
+class MOZ_TEMPORARY_CLASS nsTSubstringTuple
 {
 public: