Move runtime helper for ToName conversion onto Object.

src/objects.cc

 // Copyright 2013 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/objects.h"
 
 #include <iomanip>
 #include <sstream>
 
 #include "src/accessors.h"
@@ skipping 72 matching lines @@
     constructor = handle(
         JSFunction::cast(native_context->get(constructor_function_index)),
         isolate);
   }
   Handle<JSObject> result = isolate->factory()->NewJSObject(constructor);
   Handle<JSValue>::cast(result)->set_value(*object);
   return result;
 }
 
 
+MaybeHandle<Name> Object::ToName(Isolate* isolate, Handle<Object> object) {
+  if (object->IsName()) {
+    return Handle<Name>::cast(object);
+  } else {
+    Handle<Object> converted;
+    ASSIGN_RETURN_ON_EXCEPTION(isolate, converted,
+                               Execution::ToString(isolate, object), Name);
+    return Handle<Name>::cast(converted);
+  }
+}
+
+
 bool Object::BooleanValue() {
   if (IsBoolean()) return IsTrue();
   if (IsSmi()) return Smi::cast(this)->value() != 0;
   if (IsUndefined() || IsNull()) return false;
   if (IsUndetectableObject()) return false;   // Undetectable object is false.
   if (IsString()) return String::cast(this)->length() != 0;
   if (IsHeapNumber()) return HeapNumber::cast(this)->HeapNumberBooleanValue();
   if (IsSimd128Value()) return true;  // Simd value types evaluate to true.
   return true;
 }
@@ skipping 15720 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8