| Index: src/runtime/runtime-collections.cc | 
| diff --git a/src/runtime/runtime-collections.cc b/src/runtime/runtime-collections.cc | 
| index 8da822817eed1114901bbd0312f6c29a52c9c0ca..b25a5ef5c2f5a531bae09267200621b49a2638da 100644 | 
| --- a/src/runtime/runtime-collections.cc | 
| +++ b/src/runtime/runtime-collections.cc | 
| @@ -31,7 +31,7 @@ RUNTIME_FUNCTION(Runtime_JSCollectionGetTable) { | 
| SealHandleScope shs(isolate); | 
| DCHECK(args.length() == 1); | 
| CONVERT_ARG_CHECKED(JSObject, object, 0); | 
| -  RUNTIME_ASSERT(object->IsJSSet() || object->IsJSMap()); | 
| +  CHECK(object->IsJSSet() || object->IsJSMap()); | 
| return static_cast<JSCollection*>(object)->table(); | 
| } | 
|  | 
| @@ -91,8 +91,8 @@ RUNTIME_FUNCTION(Runtime_SetIteratorInitialize) { | 
| CONVERT_ARG_HANDLE_CHECKED(JSSetIterator, holder, 0); | 
| CONVERT_ARG_HANDLE_CHECKED(JSSet, set, 1); | 
| CONVERT_SMI_ARG_CHECKED(kind, 2) | 
| -  RUNTIME_ASSERT(kind == JSSetIterator::kKindValues || | 
| -                 kind == JSSetIterator::kKindEntries); | 
| +  CHECK(kind == JSSetIterator::kKindValues || | 
| +        kind == JSSetIterator::kKindEntries); | 
| Handle<OrderedHashSet> table(OrderedHashSet::cast(set->table())); | 
| holder->set_table(*table); | 
| holder->set_index(Smi::FromInt(0)); | 
| @@ -186,9 +186,9 @@ RUNTIME_FUNCTION(Runtime_MapIteratorInitialize) { | 
| CONVERT_ARG_HANDLE_CHECKED(JSMapIterator, holder, 0); | 
| CONVERT_ARG_HANDLE_CHECKED(JSMap, map, 1); | 
| CONVERT_SMI_ARG_CHECKED(kind, 2) | 
| -  RUNTIME_ASSERT(kind == JSMapIterator::kKindKeys || | 
| -                 kind == JSMapIterator::kKindValues || | 
| -                 kind == JSMapIterator::kKindEntries); | 
| +  CHECK(kind == JSMapIterator::kKindKeys || | 
| +        kind == JSMapIterator::kKindValues || | 
| +        kind == JSMapIterator::kKindEntries); | 
| Handle<OrderedHashMap> table(OrderedHashMap::cast(map->table())); | 
| holder->set_table(*table); | 
| holder->set_index(Smi::FromInt(0)); | 
| @@ -232,7 +232,7 @@ RUNTIME_FUNCTION(Runtime_GetWeakMapEntries) { | 
| DCHECK(args.length() == 2); | 
| CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, holder, 0); | 
| CONVERT_NUMBER_CHECKED(int, max_entries, Int32, args[1]); | 
| -  RUNTIME_ASSERT(max_entries >= 0); | 
| +  CHECK(max_entries >= 0); | 
|  | 
| Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table())); | 
| if (max_entries == 0 || max_entries > table->NumberOfElements()) { | 
| @@ -286,10 +286,10 @@ RUNTIME_FUNCTION(Runtime_WeakCollectionGet) { | 
| CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0); | 
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); | 
| CONVERT_SMI_ARG_CHECKED(hash, 2) | 
| -  RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol()); | 
| +  CHECK(key->IsJSReceiver() || key->IsSymbol()); | 
| Handle<ObjectHashTable> table( | 
| ObjectHashTable::cast(weak_collection->table())); | 
| -  RUNTIME_ASSERT(table->IsKey(isolate, *key)); | 
| +  CHECK(table->IsKey(isolate, *key)); | 
| Handle<Object> lookup(table->Lookup(key, hash), isolate); | 
| return lookup->IsTheHole(isolate) ? isolate->heap()->undefined_value() | 
| : *lookup; | 
| @@ -302,10 +302,10 @@ RUNTIME_FUNCTION(Runtime_WeakCollectionHas) { | 
| CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0); | 
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); | 
| CONVERT_SMI_ARG_CHECKED(hash, 2) | 
| -  RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol()); | 
| +  CHECK(key->IsJSReceiver() || key->IsSymbol()); | 
| Handle<ObjectHashTable> table( | 
| ObjectHashTable::cast(weak_collection->table())); | 
| -  RUNTIME_ASSERT(table->IsKey(isolate, *key)); | 
| +  CHECK(table->IsKey(isolate, *key)); | 
| Handle<Object> lookup(table->Lookup(key, hash), isolate); | 
| return isolate->heap()->ToBoolean(!lookup->IsTheHole(isolate)); | 
| } | 
| @@ -317,10 +317,10 @@ RUNTIME_FUNCTION(Runtime_WeakCollectionDelete) { | 
| CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0); | 
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); | 
| CONVERT_SMI_ARG_CHECKED(hash, 2) | 
| -  RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol()); | 
| +  CHECK(key->IsJSReceiver() || key->IsSymbol()); | 
| Handle<ObjectHashTable> table( | 
| ObjectHashTable::cast(weak_collection->table())); | 
| -  RUNTIME_ASSERT(table->IsKey(isolate, *key)); | 
| +  CHECK(table->IsKey(isolate, *key)); | 
| bool was_present = JSWeakCollection::Delete(weak_collection, key, hash); | 
| return isolate->heap()->ToBoolean(was_present); | 
| } | 
| @@ -331,12 +331,12 @@ RUNTIME_FUNCTION(Runtime_WeakCollectionSet) { | 
| DCHECK(args.length() == 4); | 
| CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0); | 
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); | 
| -  RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol()); | 
| +  CHECK(key->IsJSReceiver() || key->IsSymbol()); | 
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 2); | 
| CONVERT_SMI_ARG_CHECKED(hash, 3) | 
| Handle<ObjectHashTable> table( | 
| ObjectHashTable::cast(weak_collection->table())); | 
| -  RUNTIME_ASSERT(table->IsKey(isolate, *key)); | 
| +  CHECK(table->IsKey(isolate, *key)); | 
| JSWeakCollection::Set(weak_collection, key, value, hash); | 
| return *weak_collection; | 
| } | 
| @@ -347,7 +347,7 @@ RUNTIME_FUNCTION(Runtime_GetWeakSetValues) { | 
| DCHECK(args.length() == 2); | 
| CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, holder, 0); | 
| CONVERT_NUMBER_CHECKED(int, max_values, Int32, args[1]); | 
| -  RUNTIME_ASSERT(max_values >= 0); | 
| +  CHECK(max_values >= 0); | 
|  | 
| Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table())); | 
| if (max_values == 0 || max_values > table->NumberOfElements()) { | 
|  |