Make checked_cast a constexpr

base/numerics/safe_numerics_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <limits>
 #include <type_traits>
 
@@ skipping 646 matching lines @@
                        std::numeric_limits<float>::infinity();
   EXPECT_TRUE(std::isnan(not_a_number));
   EXPECT_EQ(0, saturated_cast<int>(not_a_number));
 }
 
 TEST(SafeNumerics, SaturatedCastChecks) {
   float not_a_number = std::numeric_limits<float>::infinity() -
                        std::numeric_limits<float>::infinity();
   EXPECT_TRUE(std::isnan(not_a_number));
   EXPECT_DEATH_IF_SUPPORTED(
-      (saturated_cast<int, base::SaturatedCastNaNBehaviorCheck>(not_a_number)),
+      (saturated_cast<int, base::CheckOnFailure>(not_a_number)),
       "");
 }
 
 TEST(SafeNumerics, IsValueInRangeForNumericType) {
   EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(0));
   EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(1));
   EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(2));
   EXPECT_FALSE(IsValueInRangeForNumericType<uint32_t>(-1));
   EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(0xffffffffu));
   EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(UINT64_C(0xffffffff)));
@@ skipping 81 matching lines @@
 
   CheckedNumeric<int> too_large = std::numeric_limits<int>::max();
   EXPECT_TRUE(too_large.IsValid());
   too_large += d;
   EXPECT_FALSE(too_large.IsValid());
   too_large -= d;
   EXPECT_FALSE(too_large.IsValid());
   too_large /= d;
   EXPECT_FALSE(too_large.IsValid());
 }