Move SaturatedArithmetic from Blink to base

ui/gfx/geometry/safe_integer_conversions_unittest.cc

 // Copyright (c) 2012 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 "ui/gfx/geometry/safe_integer_conversions.h"
 
 #include <limits>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 59 matching lines @@
   EXPECT_EQ(0, ToRoundedInt(0.f));
   EXPECT_EQ(100, ToRoundedInt(100.1f));
   EXPECT_EQ(101, ToRoundedInt(100.5f));
   EXPECT_EQ(101, ToRoundedInt(100.9f));
 
   EXPECT_EQ(int_min, ToRoundedInt(-infinity));
   EXPECT_EQ(int_min, ToRoundedInt(min));
   EXPECT_EQ(int_min, ToRoundedInt(min - 100));
 }
 
-TEST(SafeIntegerConversions, IntegerOverflow) {
-  int int_max = std::numeric_limits<int>::max();
-  int int_min = std::numeric_limits<int>::min();
-
-  EXPECT_TRUE(AddWouldOverflow(int_max, 1));
-  EXPECT_TRUE(AddWouldOverflow(int_max, int_max));
-  EXPECT_TRUE(AddWouldOverflow(int_max - 1000, 1001));
-  EXPECT_FALSE(AddWouldOverflow(int_max, 0));
-  EXPECT_FALSE(AddWouldOverflow(1, 2));
-  EXPECT_FALSE(AddWouldOverflow(1, -1));
-  EXPECT_FALSE(AddWouldOverflow(int_min, int_max));
-  EXPECT_FALSE(AddWouldOverflow(int_max - 1000, 1000));
-
-  EXPECT_TRUE(AddWouldUnderflow(int_min, -1));
-  EXPECT_TRUE(AddWouldUnderflow(int_min, int_min));
-  EXPECT_TRUE(AddWouldUnderflow(int_min + 1000, -1001));
-  EXPECT_FALSE(AddWouldUnderflow(int_min, 0));
-  EXPECT_FALSE(AddWouldUnderflow(1, 2));
-  EXPECT_FALSE(AddWouldUnderflow(1, -1));
-  EXPECT_FALSE(AddWouldUnderflow(int_min, int_max));
-  EXPECT_FALSE(AddWouldUnderflow(int_min + 1000, -1000));
-
-  EXPECT_TRUE(SubtractWouldOverflow(int_max, -1));
-  EXPECT_TRUE(SubtractWouldOverflow(int_max, int_min));
-  EXPECT_TRUE(SubtractWouldOverflow(int_max - 1000, -1001));
-  EXPECT_TRUE(SubtractWouldOverflow(0, int_min));
-  EXPECT_FALSE(SubtractWouldOverflow(int_max, 0));
-  EXPECT_FALSE(SubtractWouldOverflow(1, 2));
-  EXPECT_FALSE(SubtractWouldOverflow(-1, 1));
-  EXPECT_FALSE(SubtractWouldOverflow(int_min, int_min));
-  EXPECT_FALSE(SubtractWouldOverflow(int_max - 1000, -1000));
-  EXPECT_FALSE(SubtractWouldOverflow(-1, int_min));
-
-  EXPECT_TRUE(SubtractWouldUnderflow(int_min, 1));
-  EXPECT_TRUE(SubtractWouldUnderflow(int_min, int_max));
-  EXPECT_TRUE(SubtractWouldUnderflow(int_min + 1000, 1001));
-  EXPECT_FALSE(SubtractWouldUnderflow(int_min, 0));
-  EXPECT_FALSE(SubtractWouldUnderflow(1, 2));
-  EXPECT_FALSE(SubtractWouldUnderflow(-1, -1));
-  EXPECT_FALSE(SubtractWouldUnderflow(int_max, int_max));
-  EXPECT_FALSE(SubtractWouldUnderflow(int_min + 1000, -1000));
-
-  EXPECT_EQ(SafeAdd(0, 0), 0);
-  EXPECT_EQ(SafeAdd(1, 2), 3);
-  EXPECT_EQ(SafeAdd(int_max, 0), int_max);
-  EXPECT_EQ(SafeAdd(int_max, 1), int_max);
-  EXPECT_EQ(SafeAdd(int_max, int_max), int_max);
-  EXPECT_EQ(SafeAdd(int_max, int_min), -1);
-  EXPECT_EQ(SafeAdd(int_min, 1), int_min + 1);
-  EXPECT_EQ(SafeAdd(int_min, -1), int_min);
-  EXPECT_EQ(SafeAdd(int_min, 0), int_min);
-  EXPECT_EQ(SafeAdd(int_min, int_min), int_min);
-
-  EXPECT_EQ(SafeSubtract(0, 0), 0);
-  EXPECT_EQ(SafeSubtract(3, 2), 1);
-  EXPECT_EQ(SafeSubtract(int_max, 0), int_max);
-  EXPECT_EQ(SafeSubtract(int_max, 1), int_max - 1);
-  EXPECT_EQ(SafeSubtract(int_max, -1), int_max);
-  EXPECT_EQ(SafeSubtract(int_max, int_min), int_max);
-  EXPECT_EQ(SafeSubtract(int_min, 0), int_min);
-  EXPECT_EQ(SafeSubtract(int_min, -1), int_min + 1);
-  EXPECT_EQ(SafeSubtract(int_min, 1), int_min);
-  EXPECT_EQ(SafeSubtract(int_min, int_min), 0);
-  EXPECT_EQ(SafeSubtract(int_max, int_max), 0);
-  EXPECT_EQ(SafeSubtract(0, int_min), int_max);
-  EXPECT_EQ(SafeSubtract(-1, int_min), int_max);
-}
-
 }  // namespace gfx