Track usage of "this" and "arguments" in 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 "include/v8stdint.h"
 
 #include "src/base/build_config.h"
@@ skipping 630 matching lines @@
 };
 
 
 enum ScopeType {
   EVAL_SCOPE,      // The top-level scope for an eval source.
   FUNCTION_SCOPE,  // The top-level scope for a function.
   MODULE_SCOPE,    // The scope introduced by a module literal
   GLOBAL_SCOPE,    // The top-level scope for a program or a top-level eval.
   CATCH_SCOPE,     // The scope introduced by catch.
   BLOCK_SCOPE,     // The scope introduced by a new block.
-  WITH_SCOPE       // The scope introduced by with.
+  WITH_SCOPE,      // The scope introduced by with.
+  ARROW_SCOPE      // The top-level scope for an arrow function literal.
 };
 
 
 const uint32_t kHoleNanUpper32 = 0x7FFFFFFF;
 const uint32_t kHoleNanLower32 = 0xFFFFFFFF;
 const uint32_t kNaNOrInfinityLowerBoundUpper32 = 0x7FF00000;
 
 const uint64_t kHoleNanInt64 =
     (static_cast<uint64_t>(kHoleNanUpper32) << 32) | kHoleNanLower32;
 const uint64_t kLastNonNaNInt64 =
@@ skipping 141 matching lines @@
 
 inline bool IsConciseMethod(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kConciseMethod;
 }
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_