Unify implementations of Map handles vectors and lists

src/compiler.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/compiler.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 214 matching lines @@
     heap->AddWeakObjectToCodeDependency(object, dep);
   }
 }
 
 }  // namespace
 
 void CompilationJob::RegisterWeakObjectsInOptimizedCode(Handle<Code> code) {
   // TODO(turbofan): Move this to pipeline.cc once Crankshaft dies.
   Isolate* const isolate = code->GetIsolate();
   DCHECK(code->is_optimized_code());
-  std::vector<Handle<Map>> maps;
+  MapHandles maps;
   std::vector<Handle<HeapObject>> objects;
   {
     DisallowHeapAllocation no_gc;
     int const mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
                           RelocInfo::ModeMask(RelocInfo::CELL);
     for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
       RelocInfo::Mode mode = it.rinfo()->rmode();
       if (mode == RelocInfo::CELL &&
           code->IsWeakObjectInOptimizedCode(it.rinfo()->target_cell())) {
         objects.push_back(handle(it.rinfo()->target_cell(), isolate));
@@ skipping 1641 matching lines @@
   }
 
   if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8