Reland "Initial switch to Chromium-style CHECK_* and DCHECK_* macros.".

test/unittests/base/logging-unittest.cc

+// Copyright 2015 the V8 project 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 "src/base/logging.h"
+#include "testing/gtest-support.h"
+
+namespace v8 {
+namespace base {
+
+TEST(LoggingTest, CheckEQImpl) {
+  EXPECT_EQ(nullptr, CheckEQImpl(0.0, 0.0, ""));
+  EXPECT_EQ(nullptr, CheckEQImpl(0.0, -0.0, ""));
+  EXPECT_EQ(nullptr, CheckEQImpl(-0.0, 0.0, ""));
+  EXPECT_EQ(nullptr, CheckEQImpl(-0.0, -0.0, ""));
+}
+
+}  // namespace base
+}  // namespace v8