Introduce TypeFeedbackVector, as FixedArray grew constrictive.

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/v8.h"
 
 #include "src/ast.h"
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/ic/ic.h"
 #include "src/ic/stub-cache.h"
 #include "src/macro-assembler.h"
 #include "src/type-info.h"
 
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
-TypeFeedbackOracle::TypeFeedbackOracle(Handle<Code> code,
-                                       Handle<FixedArray> feedback_vector,
-                                       Handle<Context> native_context,
-                                       Zone* zone)
-    : native_context_(native_context),
-      zone_(zone) {
+TypeFeedbackOracle::TypeFeedbackOracle(
+    Handle<Code> code, Handle<TypeFeedbackVector> feedback_vector,
+    Handle<Context> native_context, Zone* zone)
+    : native_context_(native_context), zone_(zone) {
   BuildDictionary(code);
   DCHECK(dictionary_->IsDictionary());
   // 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_ = isolate()->factory()->CopyFixedArray(feedback_vector);
+  feedback_vector_ = TypeFeedbackVector::Copy(isolate(), feedback_vector);
 }
 
 
 static uint32_t IdToKey(TypeFeedbackId ast_id) {
   return static_cast<uint32_t>(ast_id.ToInt());
 }
 
 
 Handle<Object> TypeFeedbackOracle::GetInfo(TypeFeedbackId ast_id) {
   int entry = dictionary_->FindEntry(IdToKey(ast_id));
@@ skipping 418 matching lines @@
          UnseededNumberDictionary::kNotFound);
   // 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 v8::internal