Fix a leak in JSONParser::Parse when using hidden root optimizations.

base/json/json_parser.cc

 // Copyright (c) 2012 The Chromium 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 "base/json/json_parser.h"
 
 #include "base/float_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
@@ skipping 240 matching lines @@
     if (!CanConsume(1) || (NextChar() && GetNextToken() != T_END_OF_INPUT)) {
       ReportError(JSONReader::JSON_UNEXPECTED_DATA_AFTER_ROOT, 1);
       return NULL;
     }
   }
 
   // Dictionaries and lists can contain JSONStringValues, so wrap them in a
   // hidden root.
   if (!(options_ & JSON_DETACHABLE_CHILDREN)) {
     if (root->IsType(Value::TYPE_DICTIONARY)) {
-      return new DictionaryHiddenRootValue(&input_copy, root.release());
+      return new DictionaryHiddenRootValue(&input_copy, root.get());
     } else if (root->IsType(Value::TYPE_LIST)) {
-      return new ListHiddenRootValue(&input_copy, root.release());
+      return new ListHiddenRootValue(&input_copy, root.get());
     } else if (root->IsType(Value::TYPE_STRING)) {
       // A string type could be a JSONStringValue, but because there's no
       // corresponding HiddenRootValue, the memory will be lost. Deep copy to
       // preserve it.
       return root->DeepCopy();
     }
   }
 
   // All other values can be returned directly.
   return root.release();
@@ skipping 690 matching lines @@
                                            const std::string& description) {
   if (line || column) {
     return StringPrintf("Line: %i, column: %i, %s",
         line, column, description.c_str());
   }
   return description;
 }
 
 }  // namespace internal
 }  // namespace base