Remove the holder_ field from LookupResult

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 5952 matching lines @@
     }
   }
   info->GeneralizeRepresentation(r);
   info->field_type_ = info->field_type_.Combine(field_type_);
   return true;
 }
 
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::LookupDescriptor() {
   if (!map_->IsJSObjectMap()) return true;
-  map_->LookupDescriptor(NULL, *name_, &lookup_);
+  map_->LookupDescriptor(*name_, &lookup_);
   return LoadResult(map_);
 }
 
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::LoadResult(Handle<Map> map) {
   if (!IsLoad() && IsProperty() && IsReadOnly()) {
     return false;
   }
 
   if (IsData()) {
@@ skipping 71 matching lines @@
   while (map->prototype()->IsJSObject()) {
     holder_ = handle(JSObject::cast(map->prototype()));
     if (holder_->map()->is_deprecated()) {
       JSObject::TryMigrateInstance(holder_);
     }
     map = Handle<Map>(holder_->map());
     if (!CanInlinePropertyAccess(map)) {
       lookup_.NotFound();
       return false;
     }
-    map->LookupDescriptor(*holder_, *name_, &lookup_);
+    map->LookupDescriptor(*name_, &lookup_);
     if (IsFound()) return LoadResult(map);
   }
   lookup_.NotFound();
   return true;
 }
 
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::CanAccessMonomorphic() {
   if (!CanInlinePropertyAccess(map_)) return false;
   if (IsJSObjectFieldAccessor()) return IsLoad();
   if (map_->function_with_prototype() && !map_->has_non_instance_prototype() &&
       name_.is_identical_to(isolate()->factory()->prototype_string())) {
     return IsLoad();
   }
   if (!LookupDescriptor()) return false;
   if (IsFound()) return IsLoad() || !IsReadOnly();
   if (!LookupInPrototypes()) return false;
   if (IsLoad()) return true;
 
   if (IsAccessorConstant()) return true;
-  map_->LookupTransition(NULL, *name_, NONE, &lookup_);
+  map_->LookupTransition(*name_, NONE, &lookup_);
   if (lookup_.IsTransitionToData() && map_->unused_property_fields() > 0) {
     // Construct the object field access.
     int descriptor = transition()->LastAdded();
     int index =
         transition()->instance_descriptors()->GetFieldIndex(descriptor) -
         map_->inobject_properties();
     PropertyDetails details =
         transition()->instance_descriptors()->GetDetails(descriptor);
     Representation representation = details.representation();
     access_ = HObjectAccess::ForField(map_, index, representation, name_);
@@ skipping 7325 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal