[destructuring] Support computed property names in patterns.

src/preparser.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_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
@@ skipping 2542 matching lines @@
 
     case Token::NUMBER:
       Consume(Token::NUMBER);
       *name = this->GetNumberAsSymbol(scanner());
       break;
 
     case Token::LBRACK:
       if (allow_harmony_computed_property_names_) {
         *is_computed_name = true;
         Consume(Token::LBRACK);
-        ExpressionT expression =
-            ParseAssignmentExpression(true, classifier, CHECK_OK);
+        ExpressionClassifier computed_name_classifier;
+        ExpressionT expression = ParseAssignmentExpression(
+            true, &computed_name_classifier, CHECK_OK);
+        classifier->AccumulateReclassifyingAsPattern(computed_name_classifier);
         Expect(Token::RBRACK, CHECK_OK);
         return expression;
       }
 
     // Fall through.
     case Token::STATIC:
       *is_static = true;
 
     // Fall through.
     default:
@@ skipping 1430 matching lines @@
       *ok = false;
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H