602   RUNTIME_ASSERT(name->IsString() || name->IsUndefined());  in RUNTIME_FUNCTION()
604   if (name->IsString()) symbol->set_name(*name);  in RUNTIME_FUNCTION()
613   RUNTIME_ASSERT(name->IsString() || name->IsUndefined());  in RUNTIME_FUNCTION()
615   if (name->IsString()) symbol->set_name(*name);  in RUNTIME_FUNCTION()
624   RUNTIME_ASSERT(name->IsString() || name->IsUndefined());  in RUNTIME_FUNCTION()
626   if (name->IsString()) symbol->set_name(*name);  in RUNTIME_FUNCTION()
3391     DCHECK(element->IsSmi() || element->IsString());  in AddElement()
4800   if (object->IsString()) {  in GetElementOrCharAt()
4814   if (object->IsString() || object->IsNumber() || object->IsBoolean()) {  in GetElementOrCharAt()
4992   } else if (receiver_obj->IsString() && key_obj->IsSmi()) {  in RUNTIME_FUNCTION()
5204       if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));  in SetObjectProperty()
5255       if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));  in DefineObjectProperty()
5308   if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));  in DeleteObjectProperty()
5701   } else if (object->IsString() && key_is_array_index) {  in RUNTIME_FUNCTION()
6031     if (entry->IsString()) {  in RUNTIME_FUNCTION()
6700   if (answer->IsException() || answer->IsString()) return answer;  in ConvertCase()
6882            (element->IsString() && String::cast(element)->LooksValid()));  in CopyCachedOneByteCharsToArray()
7198     } else if (elt->IsString()) {  in StringBuilderConcatLength()
7257       if (first->IsString()) return first;  in RUNTIME_FUNCTION()
7312     RUNTIME_ASSERT(first->IsString());  in RUNTIME_FUNCTION()
7326     RUNTIME_ASSERT(element_obj->IsString());  in RUNTIME_FUNCTION()
7349   RUNTIME_ASSERT(fixed_array->get(0)->IsString());  in RUNTIME_FUNCTION()
7361     RUNTIME_ASSERT(fixed_array->get(i)->IsString());  in RUNTIME_FUNCTION()
7442     RUNTIME_ASSERT(elements->get(i + 1)->IsString());  in RUNTIME_FUNCTION()
9368   if (!args[0]->IsContext() || !args[1]->IsString()) {  in LoadLookupSlotHelper()
9684   if (args[0]->IsString()) {  in RUNTIME_FUNCTION()
9956       !args[1]->IsString()) {  in RUNTIME_FUNCTION_RETURN_PAIR()
11684         DCHECK(keys->get(i)->IsString());  in MaterializeLocalContext()
11843       DCHECK(keys->get(i)->IsString());  in MaterializeClosure()
13953     if (!locale_id->IsString()) {  in RUNTIME_FUNCTION()
14049       tag->IsString() && String::cast(*tag)->Equals(*expected_type));  in RUNTIME_FUNCTION()
14569       if (Script::cast(obj)->name()->IsString()) {  in Runtime_GetScriptFromScriptName()
15490   if (!args[0]->IsString()) return Smi::FromInt(0);  in RUNTIME_FUNCTION()
15630   if (!args[0]->IsString()) return isolate->heap()->undefined_value();  in RUNTIME_FUNCTION()