Fix use of base/numerics in IntToString

base/strings/string_number_conversions.cc

Index: base/strings/string_number_conversions.cc
diff --git a/base/strings/string_number_conversions.cc b/base/strings/string_number_conversions.cc
index 755811ded7e32beea4221ca128fee3dc0fb2d8a9..cc4206a5d50b5f0d0f16b9002163852ce2cb5675 100644
--- a/base/strings/string_number_conversions.cc
+++ b/base/strings/string_number_conversions.cc
@@ -35,7 +35,8 @@ struct IntToStringT {
 
     // The ValueOrDie call below can never fail, because UnsignedAbs is valid
     // for all valid inputs.
-    auto res = CheckedNumeric<INT>(value).UnsignedAbs().ValueOrDie();
+    typename decltype(CheckedNumeric<INT>(value).UnsignedAbs())::type res =
+        CheckedNumeric<INT>(value).UnsignedAbs().ValueOrDie();
 
     CHR* end = outbuf + kOutputBufSize;
     CHR* i = end;