Add Object::IsNullOrUndefined(Isolate*) helper method

src/compiler/js-call-reducer.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/compiler/js-call-reducer.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
@@ skipping 438 matching lines @@
     } else if (m.Value()->IsJSBoundFunction()) {
       Handle<JSBoundFunction> function =
           Handle<JSBoundFunction>::cast(m.Value());
       Handle<JSReceiver> bound_target_function(
           function->bound_target_function(), isolate());
       Handle<Object> bound_this(function->bound_this(), isolate());
       Handle<FixedArray> bound_arguments(function->bound_arguments(),
                                          isolate());
       CallFunctionParameters const& p = CallFunctionParametersOf(node->op());
       ConvertReceiverMode const convert_mode =
-          (bound_this->IsNull(isolate()) || bound_this->IsUndefined(isolate()))
+          (bound_this->IsNullOrUndefined(isolate()))
               ? ConvertReceiverMode::kNullOrUndefined
               : ConvertReceiverMode::kNotNullOrUndefined;
       size_t arity = p.arity();
       DCHECK_LE(2u, arity);
       // Patch {node} to use [[BoundTargetFunction]] and [[BoundThis]].
       NodeProperties::ReplaceValueInput(
           node, jsgraph()->Constant(bound_target_function), 0);
       NodeProperties::ReplaceValueInput(node, jsgraph()->Constant(bound_this),
                                         1);
       // Insert the [[BoundArguments]] for {node}.
@@ skipping 211 matching lines @@
   return jsgraph()->javascript();
 }
 
 SimplifiedOperatorBuilder* JSCallReducer::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8