Bug 869685 - Reintroduce long long support in CheckedInt - r=Waldo

mfbt/CheckedInt.h

@@ -125,6 +125,13 @@ template<>
 struct IsSupportedPass2<unsigned long>
 { static const bool value = true; };
 
+template<>
+struct IsSupportedPass2<long long>
+{ static const bool value = true; };
+
+template<>
+struct IsSupportedPass2<unsigned long long>
+{ static const bool value = true; };
 
 /*
  * Step 2: some integer-traits kind of stuff.

mfbt/tests/TestCheckedInt.cpp

@@ -423,6 +423,8 @@ void test()
   typedef unsigned short unsignedShort;
   typedef unsigned int  unsignedInt;
   typedef unsigned long unsignedLong;
+  typedef long long longLong;
+  typedef unsigned long long unsignedLongLong;
 
   VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(char)
   VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(signedChar)
@@ -433,6 +435,8 @@ void test()
   VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(unsignedInt)
   VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(long)
   VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(unsignedLong)
+  VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(longLong)
+  VERIFY_CONSTRUCTION_FROM_INTEGER_TYPE(unsignedLongLong)
 
   /* Test increment/decrement operators */
 
@@ -485,6 +489,8 @@ int main()
   test<unsigned int>();
   test<long>();
   test<unsigned long>();
+  test<long long>();
+  test<unsigned long long>();
 
   const int MIN_TYPES_TESTED = 9;
   if (gIntegerTypesTested < MIN_TYPES_TESTED) {