[parser] Lazy compilation no longer needs context chain.

src/ast/scopes.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/ast/scopes.h"
 
 #include <set>
 
 #include "src/accessors.h"
 #include "src/ast/ast.h"
@@ skipping 1092 matching lines @@
     // TODO(marja): Refactor parsing modes: also add s->is_function_scope()
     // here.
   }
   return true;
 }
 
 bool DeclarationScope::AllowsLazyCompilation() const {
   return !force_eager_compilation_;
 }
 
-bool DeclarationScope::AllowsLazyCompilationWithoutContext() const {
-  if (force_eager_compilation_) return false;
-  // Disallow lazy compilation without context if any outer scope needs a
-  // context.
-  for (const Scope* scope = outer_scope_; scope != nullptr;
-       scope = scope->outer_scope_) {
-    if (scope->NeedsContext()) return false;
-  }
-  return true;
-}
-
 int Scope::ContextChainLength(Scope* scope) const {
   int n = 0;
   for (const Scope* s = this; s != scope; s = s->outer_scope_) {
     DCHECK(s != NULL);  // scope must be in the scope chain
     if (s->NeedsContext()) n++;
   }
   return n;
 }
 
 int Scope::ContextChainLengthUntilOutermostSloppyEval() const {
@@ skipping 789 matching lines @@
   Variable* function =
       is_function_scope() ? AsDeclarationScope()->function_var() : nullptr;
   bool is_function_var_in_context =
       function != nullptr && function->IsContextSlot();
   return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
          (is_function_var_in_context ? 1 : 0);
 }
 
 }  // namespace internal
 }  // namespace v8