Revert "[turbofan] Make Factory::NewNumber() always return the minus_zero_value."

test/unittests/factory-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/factory.h"
-#include "src/handles-inl.h"
-#include "test/unittests/test-utils.h"
-#include "testing/gmock-support.h"
-
-using testing::BitEq;
-
-namespace v8 {
-namespace internal {
-
-typedef TestWithIsolate FactoryTest;
-
-
-namespace {
-
-const PretenureFlag kPretenureFlags[] = {TENURED, NOT_TENURED};
-
-}  // namespace
-
-
-TEST_F(FactoryTest, MinusZeroValue) {
-  Handle<Object> minus_zero_value = factory()->minus_zero_value();
-  EXPECT_TRUE(minus_zero_value->IsHeapNumber());
-  EXPECT_THAT(minus_zero_value->Number(), BitEq(-0.0));
-}
-
-
-TEST_F(FactoryTest, NewNumberWithMinusZero) {
-  Handle<Object> minus_zero_value = factory()->minus_zero_value();
-  TRACED_FOREACH(PretenureFlag, pretenure_flag, kPretenureFlags) {
-    EXPECT_TRUE(minus_zero_value.is_identical_to(
-        factory()->NewNumber(-0.0, pretenure_flag)));
-  }
-}
-
-
-TEST_F(FactoryTest, NewHeapNumberWithMinusZero) {
-  TRACED_FOREACH(PretenureFlag, pretenure_flag, kPretenureFlags) {
-    Handle<Object> value =
-        factory()->NewHeapNumber(-0.0, IMMUTABLE, pretenure_flag);
-    EXPECT_TRUE(value->IsHeapNumber());
-    EXPECT_THAT(value->Number(), BitEq(-0.0));
-    EXPECT_FALSE(value.is_identical_to(factory()->minus_zero_value()));
-  }
-}
-
-}  // namespace internal
-}  // namespace v8