[stubs] Introduce a proper ToBooleanStub.

src/runtime/runtime-interpreter.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/runtime/runtime-utils.h"
 
 #include <iomanip>
 
 #include "src/arguments.h"
 #include "src/frames-inl.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/isolate-inl.h"
 #include "src/ostreams.h"
 
 namespace v8 {
 namespace internal {
 
-RUNTIME_FUNCTION(Runtime_InterpreterToBoolean) {
-  SealHandleScope shs(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_CHECKED(Object, x, 0);
-  return isolate->heap()->ToBoolean(x->BooleanValue());
-}
-
-
-RUNTIME_FUNCTION(Runtime_InterpreterLogicalNot) {
-  SealHandleScope shs(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_CHECKED(Object, x, 0);
-  return isolate->heap()->ToBoolean(!x->BooleanValue());
-}
-
-
 RUNTIME_FUNCTION(Runtime_InterpreterNewClosure) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0);
   CONVERT_SMI_ARG_CHECKED(pretenured_flag, 1);
   Handle<Context> context(isolate->context(), isolate);
   return *isolate->factory()->NewFunctionFromSharedFunctionInfo(
       shared, context, static_cast<PretenureFlag>(pretenured_flag));
 }
 
@@ skipping 109 matching lines @@
 RUNTIME_FUNCTION(Runtime_InterpreterSetPendingMessage) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, message, 0);
   isolate->thread_local_top()->pending_message_obj_ = *message;
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8