[ic] Use UnseededNumberDictionary as a storage for names in TypeFeedbackMetadata.

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/ast/ast.h"
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/ic/ic.h"
 #include "src/ic/stub-cache.h"
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
 TypeFeedbackOracle::TypeFeedbackOracle(
     Isolate* isolate, Zone* zone, Handle<Code> code,
     Handle<TypeFeedbackVector> feedback_vector, Handle<Context> native_context)
     : native_context_(native_context), isolate_(isolate), zone_(zone) {
   BuildDictionary(code);
-  DCHECK(dictionary_->IsDictionary());
+  DCHECK(dictionary_->IsUnseededNumberDictionary());
   // We make a copy of the feedback vector because a GC could clear
   // the type feedback info contained therein.
   // TODO(mvstanton): revisit the decision to copy when we weakly
   // traverse the feedback vector at GC time.
   feedback_vector_ = TypeFeedbackVector::Copy(isolate, feedback_vector);
 }
 
 
 static uint32_t IdToKey(TypeFeedbackId ast_id) {
   return static_cast<uint32_t>(ast_id.ToInt());
@@ skipping 433 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