[ic] Delete old KeyedLoadIC code

src/heap/heap.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/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 1446 matching lines @@
 
   // We finished a marking cycle. We can uncommit the marking deque until
   // we start marking again.
   mark_compact_collector()->marking_deque()->Uninitialize();
   mark_compact_collector()->EnsureMarkingDequeIsCommitted(
       MarkCompactCollector::kMinMarkingDequeSize);
 }
 
 
 void Heap::MarkCompactPrologue() {
-  // At any old GC clear the keyed lookup cache to enable collection of unused
-  // maps.
-  isolate_->keyed_lookup_cache()->Clear();
   isolate_->context_slot_cache()->Clear();
   isolate_->descriptor_lookup_cache()->Clear();
   RegExpResultsCache::Clear(string_split_cache());
   RegExpResultsCache::Clear(regexp_multiple_cache());
 
   isolate_->compilation_cache()->MarkCompactPrologue();
 
   CompletelyClearInstanceofCache();
 
   FlushNumberStringCache();
@@ skipping 1400 matching lines @@
   cell = factory->NewPropertyCell();
   cell->set_value(Smi::FromInt(Isolate::kArrayProtectorValid));
   set_string_length_protector(*cell);
 
   set_serialized_templates(empty_fixed_array());
 
   set_weak_stack_trace_list(Smi::kZero);
 
   set_noscript_shared_function_infos(Smi::kZero);
 
-  // Initialize keyed lookup cache.
-  isolate_->keyed_lookup_cache()->Clear();
-
   // Initialize context slot cache.
   isolate_->context_slot_cache()->Clear();
 
   // Initialize descriptor cache.
   isolate_->descriptor_lookup_cache()->Clear();
 
   // Initialize compilation cache.
   isolate_->compilation_cache()->Clear();
 }
 
@@ skipping 3600 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8