Revert of Improve saturated_cast performance

base/numerics/safe_numerics_unittest.cc

Index: base/numerics/safe_numerics_unittest.cc
diff --git a/base/numerics/safe_numerics_unittest.cc b/base/numerics/safe_numerics_unittest.cc
index 5304593725b67d12540228db8895e05c48d5d4d6..0e3d999b2f5270872aa203fdd01843179a4a684b 100644
--- a/base/numerics/safe_numerics_unittest.cc
+++ b/base/numerics/safe_numerics_unittest.cc
@@ -671,14 +671,7 @@
     TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max());
     TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
     TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, static_cast<Src>(-1));
-
-    // Additional saturation tests.
-    EXPECT_EQ(DstLimits::max(), saturated_cast<Dst>(SrcLimits::max()));
-    EXPECT_EQ(DstLimits::lowest(), saturated_cast<Dst>(SrcLimits::lowest()));
-
     if (SrcLimits::is_iec559) {
-      EXPECT_EQ(Dst(0), saturated_cast<Dst>(SrcLimits::quiet_NaN()));
-
       TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::max() * -1);
       TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity());
       TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1);
@@ -721,10 +714,6 @@
     TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::lowest());
     TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max());
     TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1));
-
-    // Additional saturation tests.
-    EXPECT_EQ(DstLimits::max(), saturated_cast<Dst>(SrcLimits::max()));
-    EXPECT_EQ(Dst(0), saturated_cast<Dst>(SrcLimits::lowest()));
   }
 };