Reland of [refactoring] Split CodeAssemblerState out of CodeAssembler

src/fast-accessor-assembler.h

 // Copyright 2015 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.
 
 #ifndef V8_FAST_ACCESSOR_ASSEMBLER_H_
 #define V8_FAST_ACCESSOR_ASSEMBLER_H_
 
 #include <stdint.h>
 #include <memory>
 #include <vector>
@@ skipping 80 matching lines @@
   CodeStubAssembler::Label* FromId(LabelId value) const;
 
   void CheckIsJSObjectOrJump(ValueId value, LabelId label_id);
 
   void Clear();
   Zone* zone() { return &zone_; }
   Isolate* isolate() const { return isolate_; }
 
   Zone zone_;
   Isolate* isolate_;
+  compiler::CodeAssemblerState assembler_state_;
   std::unique_ptr<CodeStubAssembler> assembler_;
 
   // To prevent exposing the RMA internals to the outside world, we'll map
   // Node + Label pointers integers wrapped in ValueId and LabelId instances.
   // These vectors maintain this mapping.
   std::vector<compiler::Node*> nodes_;
   std::vector<CodeStubAssembler::Label*> labels_;
 
   // Remember the current state for easy error checking. (We prefer to be
   // strict as this class will be exposed at the API.)
   enum { kBuilding, kBuilt, kError } state_;
 
   DISALLOW_COPY_AND_ASSIGN(FastAccessorAssembler);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FAST_ACCESSOR_ASSEMBLER_H_