Fix a leak in unzip code. I was calling the wrong close function.

chrome/common/unzip.cc

 // Copyright (c) 2006-2008 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 "chrome/common/unzip.h"
 
 #include "base/file_util.h"
 #include "base/string_util.h"
 #include "net/base/file_stream.h"
 #include "third_party/zlib/contrib/minizip/unzip.h"
@@ skipping 177 matching lines @@
 
     if (i + 1 < zip_info.number_entry) {
       err = unzGoToNextFile(zip_file);
       if (err != UNZ_OK) {
         LOG(WARNING) << "error %d in unzGoToNextFile";
         ret = false;
         break;
       }
     }
   }
-  unzCloseCurrentFile(zip_file);
+  unzClose(zip_file);
   return ret;
 }