Do not use new struct type where unnecessary.

src/factory.cc

 // Copyright 2014 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/factory.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast.h"
 #include "src/base/bits.h"
@@ skipping 110 matching lines @@
     Handle<ScopeInfo> scope_info, Handle<Object> extension) {
   Handle<ContextExtension> result =
       Handle<ContextExtension>::cast(NewStruct(CONTEXT_EXTENSION_TYPE));
   result->set_scope_info(*scope_info);
   result->set_extension(*extension);
   return result;
 }
 
 Handle<ConstantElementsPair> Factory::NewConstantElementsPair(
     ElementsKind elements_kind, Handle<FixedArrayBase> constant_values) {
-  Handle<ConstantElementsPair> result = Handle<ConstantElementsPair>::cast(
-      NewStruct(CONSTANT_ELEMENTS_PAIR_TYPE));
+  Handle<ConstantElementsPair> result =
+      Handle<ConstantElementsPair>::cast(NewStruct(TUPLE2_TYPE));
   result->set_elements_kind(elements_kind);
   result->set_constant_values(*constant_values);
   return result;
 }
 
 Handle<Oddball> Factory::NewOddball(Handle<Map> map, const char* to_string,
                                     Handle<Object> to_number,
                                     const char* type_of, byte kind) {
   Handle<Oddball> oddball = New<Oddball>(map, OLD_SPACE);
   Oddball::Initialize(isolate(), oddball, to_string, to_number, type_of, kind);
@@ skipping 110 matching lines @@
   Handle<AccessorPair> accessors =
       Handle<AccessorPair>::cast(NewStruct(ACCESSOR_PAIR_TYPE));
   accessors->set_getter(*null_value(), SKIP_WRITE_BARRIER);
   accessors->set_setter(*null_value(), SKIP_WRITE_BARRIER);
   return accessors;
 }
 
 
 Handle<TypeFeedbackInfo> Factory::NewTypeFeedbackInfo() {
   Handle<TypeFeedbackInfo> info =
-      Handle<TypeFeedbackInfo>::cast(NewStruct(TYPE_FEEDBACK_INFO_TYPE));
+      Handle<TypeFeedbackInfo>::cast(NewStruct(TUPLE3_TYPE));
   info->initialize_storage();
   return info;
 }
 
 
 // Internalized strings are created in the old generation (data space).
 Handle<String> Factory::InternalizeUtf8String(Vector<const char> string) {
   Utf8StringKey key(string, isolate()->heap()->HashSeed());
   return InternalizeStringWithKey(&key);
 }
@@ skipping 2320 matching lines @@
   debug_info->set_break_points(*break_points);
 
   // Link debug info to function.
   shared->set_debug_info(*debug_info);
 
   return debug_info;
 }
 
 Handle<BreakPointInfo> Factory::NewBreakPointInfo(int source_position) {
   Handle<BreakPointInfo> new_break_point_info =
-      Handle<BreakPointInfo>::cast(NewStruct(BREAK_POINT_INFO_TYPE));
+      Handle<BreakPointInfo>::cast(NewStruct(TUPLE2_TYPE));
   new_break_point_info->set_source_position(source_position);
   new_break_point_info->set_break_point_objects(*undefined_value());
   return new_break_point_info;
 }
 
 Handle<StackFrameInfo> Factory::NewStackFrameInfo() {
   Handle<StackFrameInfo> stack_frame_info =
       Handle<StackFrameInfo>::cast(NewStruct(STACK_FRAME_INFO_TYPE));
   stack_frame_info->set_line_number(0);
   stack_frame_info->set_column_number(0);
@@ skipping 319 matching lines @@
     Handle<AccessorInfo> prototype =
         Accessors::FunctionPrototypeInfo(isolate(), rw_attribs);
     Descriptor d = Descriptor::AccessorConstant(
         Handle<Name>(Name::cast(prototype->name())), prototype, rw_attribs);
     map->AppendDescriptor(&d);
   }
 }
 
 }  // namespace internal
 }  // namespace v8