Unify implementations of Map handles vectors and lists

src/type-info.cc

 // Copyright 2012 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/type-info.h"
 
 #include "src/assembler-inl.h"
 #include "src/ast/ast.h"
 #include "src/code-stubs.h"
 #include "src/ic/ic.h"
@@ skipping 427 matching lines @@
     CollectReceiverTypes(&nexus, types);
   } else {
     DCHECK(IsKeyedStoreICKind(kind));
     KeyedStoreICNexus nexus(feedback_vector_, slot);
     CollectReceiverTypes(&nexus, types);
   }
 }
 
 void TypeFeedbackOracle::CollectReceiverTypes(FeedbackNexus* nexus,
                                               SmallMapList* types) {
-  MapHandleList maps;
+  MapHandles maps;
   if (nexus->ExtractMaps(&maps) == 0) {
     return;
   }
 
-  types->Reserve(maps.length(), zone());
-  for (int i = 0; i < maps.length(); i++) {
-    types->AddMapIfMissing(maps.at(i), zone());
+  types->Reserve(static_cast<int>(maps.size()), zone());
+  for (Handle<Map> map : maps) {
+    types->AddMapIfMissing(map, zone());
   }
 }
 
 
 uint16_t TypeFeedbackOracle::ToBooleanTypes(TypeFeedbackId id) {
   Handle<Object> object = GetInfo(id);
   return object->IsCode() ? Handle<Code>::cast(object)->to_boolean_state() : 0;
 }
 
 
@@ skipping 74 matching lines @@
   // Dictionary has been allocated with sufficient size for all elements.
   DisallowHeapAllocation no_need_to_resize_dictionary;
   HandleScope scope(isolate());
   USE(UnseededNumberDictionary::AtNumberPut(
       dictionary_, IdToKey(ast_id), handle(target, isolate())));
 }
 
 
 }  // namespace internal
 }  // namespace v8