Revert of Separate Scope into DeclarationScope and Scope

src/globals.h

 // 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.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 411 matching lines @@
 class MacroAssembler;
 class Map;
 class MapSpace;
 class MarkCompactCollector;
 class NewSpace;
 class Object;
 class OldSpace;
 class ParameterCount;
 class Foreign;
 class Scope;
-class DeclarationScope;
 class ScopeInfo;
 class Script;
 class Smi;
 template <typename Config, class Allocator = FreeStoreAllocationPolicy>
 class SplayTree;
 class String;
 class Symbol;
 class Name;
 class Struct;
 class TypeFeedbackVector;
@@ skipping 706 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_