[turbofan] Unify BooleanToNumber, StringToNumber and PlainPrimitiveToNumber.

test/unittests/compiler/simplified-operator-unittest.cc

 // Copyright 2014 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/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/compiler/operator-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/types.h"
 #include "test/unittests/test-utils.h"
@@ skipping 20 matching lines @@
   return os << IrOpcode::Mnemonic(pop.opcode);
 }
 
 const PureOperator kPureOperators[] = {
 #define PURE(Name, properties, input_count)              \
   {                                                      \
     &SimplifiedOperatorBuilder::Name, IrOpcode::k##Name, \
         Operator::kPure | properties, input_count        \
   }
     PURE(BooleanNot, Operator::kNoProperties, 1),
-    PURE(BooleanToNumber, Operator::kNoProperties, 1),
     PURE(NumberEqual, Operator::kCommutative, 2),
     PURE(NumberLessThan, Operator::kNoProperties, 2),
     PURE(NumberLessThanOrEqual, Operator::kNoProperties, 2),
     PURE(NumberAdd, Operator::kCommutative, 2),
     PURE(NumberSubtract, Operator::kNoProperties, 2),
     PURE(NumberMultiply, Operator::kCommutative, 2),
     PURE(NumberDivide, Operator::kNoProperties, 2),
     PURE(NumberModulus, Operator::kNoProperties, 2),
     PURE(NumberBitwiseOr, Operator::kCommutative, 2),
     PURE(NumberBitwiseXor, Operator::kCommutative, 2),
@@ skipping 244 matching lines @@
 }
 
 
 INSTANTIATE_TEST_CASE_P(SimplifiedOperatorTest,
                         SimplifiedElementAccessOperatorTest,
                         ::testing::ValuesIn(kElementAccesses));
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8