Replace gfx::ClampToInt with base::saturated_cast.

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.
 
 #if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS)
 #include <mmintrin.h>
 #endif
 #include <stdint.h>
 
 #include <limits>
@@ skipping 544 matching lines @@
 // Since that's intentional, we need to shut this warning off.
 #if defined(COMPILER_MSVC)
 #pragma warning(disable : 4756)
 #endif
 
   int small_positive = 1;
   int small_negative = -1;
   double double_small = 1.0;
   double double_large = numeric_limits<double>::max();
   double double_infinity = numeric_limits<float>::infinity();
+  double double_large_int = numeric_limits<int>::max();
+  double double_small_int = numeric_limits<int>::min();
 
   // Just test that the casts compile, since the other tests cover logic.
   EXPECT_EQ(0, checked_cast<int>(static_cast<size_t>(0)));
   EXPECT_EQ(0, strict_cast<int>(static_cast<char>(0)));
   EXPECT_EQ(0, strict_cast<int>(static_cast<unsigned char>(0)));
   EXPECT_EQ(0U, strict_cast<unsigned>(static_cast<unsigned char>(0)));
   EXPECT_EQ(1ULL, static_cast<uint64_t>(StrictNumeric<size_t>(1U)));
   EXPECT_EQ(1ULL, static_cast<uint64_t>(SizeT(1U)));
   EXPECT_EQ(1U, static_cast<size_t>(StrictNumeric<unsigned>(1U)));
 
@@ skipping 12 matching lines @@
             static_cast<int>(small_negative));
   EXPECT_EQ(saturated_cast<int>(small_positive),
             static_cast<int>(small_positive));
   EXPECT_EQ(saturated_cast<unsigned>(small_negative),
             static_cast<unsigned>(0));
   EXPECT_EQ(saturated_cast<int>(double_small),
             static_cast<int>(double_small));
   EXPECT_EQ(saturated_cast<int>(double_large), numeric_limits<int>::max());
   EXPECT_EQ(saturated_cast<float>(double_large), double_infinity);
   EXPECT_EQ(saturated_cast<float>(-double_large), -double_infinity);
+  EXPECT_EQ(numeric_limits<int>::min(), saturated_cast<int>(double_small_int));
+  EXPECT_EQ(numeric_limits<int>::max(), saturated_cast<int>(double_large_int));
 }