[fullcodegen] Lift restriction on --debug-code flag.

src/full-codegen/arm64/full-codegen-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 753 matching lines @@
     Split(eq, if_true, if_false, NULL);
     __ Bind(&skip);
   }
 }
 
 
 void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) {
   // The variable in the declaration always resides in the current function
   // context.
   DCHECK_EQ(0, scope()->ContextChainLength(variable->scope()));
-  if (generate_debug_code_) {
+  if (FLAG_debug_code) {
     // Check that we're not inside a with or catch context.
     __ Ldr(x1, FieldMemOperand(cp, HeapObject::kMapOffset));
     __ CompareRoot(x1, Heap::kWithContextMapRootIndex);
     __ Check(ne, kDeclarationInWithContext);
     __ CompareRoot(x1, Heap::kCatchContextMapRootIndex);
     __ Check(ne, kDeclarationInCatchContext);
   }
 }
 
 
@@ skipping 3536 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64