Reland of "Remove ExternalArray, derived types, and element kinds"

src/lookup.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/v8.h"
 
 #include "src/bootstrapper.h"
 #include "src/deoptimizer.h"
 #include "src/lookup.h"
 #include "src/lookup-inl.h"
@@ skipping 99 matching lines @@
   state_ = BEFORE_PROPERTY;
   interceptor_state_ = InterceptorState::kUninitialized;
   state_ = LookupInHolder(*holder_map_, *holder_);
   DCHECK(IsFound() || holder_map_->is_dictionary_map());
 }
 
 
 void LookupIterator::ReloadHolderMap() {
   DCHECK_EQ(DATA, state_);
   DCHECK(IsElement());
-  DCHECK(JSObject::cast(*holder_)->HasExternalArrayElements() ||
-         JSObject::cast(*holder_)->HasFixedTypedArrayElements());
+  DCHECK(JSObject::cast(*holder_)->HasFixedTypedArrayElements());
   if (*holder_map_ != holder_->map()) {
     holder_map_ = handle(holder_->map(), isolate_);
   }
 }
 
 
 void LookupIterator::PrepareForDataProperty(Handle<Object> value) {
   DCHECK(state_ == DATA || state_ == ACCESSOR);
   DCHECK(HolderIsReceiverOrHiddenPrototype());
 
@@ skipping 22 matching lines @@
   ReloadPropertyInformation();
 }
 
 
 void LookupIterator::ReconfigureDataProperty(Handle<Object> value,
                                              PropertyAttributes attributes) {
   DCHECK(state_ == DATA || state_ == ACCESSOR);
   DCHECK(HolderIsReceiverOrHiddenPrototype());
   Handle<JSObject> holder = GetHolder<JSObject>();
   if (IsElement()) {
-    DCHECK(!holder->HasExternalArrayElements());
     DCHECK(!holder->HasFixedTypedArrayElements());
     DCHECK(attributes != NONE || !holder->HasFastElements());
     Handle<FixedArrayBase> elements(holder->elements());
     holder->GetElementsAccessor()->Reconfigure(holder, elements, number_, value,
                                                attributes);
   } else if (holder_map_->is_dictionary_map()) {
     PropertyDetails details(attributes, v8::internal::DATA, 0,
                             PropertyCellType::kMutable);
     JSObject::SetNormalizedProperty(holder, name(), value, details);
   } else {
@@ skipping 366 matching lines @@
       case InterceptorState::kSkipNonMasking:
         return true;
       case InterceptorState::kProcessNonMasking:
         return false;
     }
   }
   return interceptor_state_ == InterceptorState::kProcessNonMasking;
 }
 }  // namespace internal
 }  // namespace v8