Move Range code to gfx.

ui/base/range/range_mac_unittest.mm

-// Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
-#include "ui/base/range/range.h"
-
-TEST(RangeTest, FromNSRange) {
-  NSRange nsr = NSMakeRange(10, 3);
-  ui::Range r(nsr);
-  EXPECT_EQ(nsr.location, r.start());
-  EXPECT_EQ(13U, r.end());
-  EXPECT_EQ(nsr.length, r.length());
-  EXPECT_FALSE(r.is_reversed());
-  EXPECT_TRUE(r.IsValid());
-}
-
-TEST(RangeTest, ToNSRange) {
-  ui::Range r(10, 12);
-  NSRange nsr = r.ToNSRange();
-  EXPECT_EQ(10U, nsr.location);
-  EXPECT_EQ(2U, nsr.length);
-}
-
-TEST(RangeTest, ReversedToNSRange) {
-  ui::Range r(20, 10);
-  NSRange nsr = r.ToNSRange();
-  EXPECT_EQ(10U, nsr.location);
-  EXPECT_EQ(10U, nsr.length);
-}
-
-TEST(RangeTest, FromNSRangeInvalid) {
-  NSRange nsr = NSMakeRange(NSNotFound, 0);
-  ui::Range r(nsr);
-  EXPECT_FALSE(r.IsValid());
-}
-
-TEST(RangeTest, ToNSRangeInvalid) {
-  ui::Range r(ui::Range::InvalidRange());
-  NSRange nsr = r.ToNSRange();
-  EXPECT_EQ(NSNotFound, nsr.location);
-  EXPECT_EQ(0U, nsr.length);
-}