| Index: net/ssl/ssl_connection_status_flags.h
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| diff --git a/net/ssl/ssl_connection_status_flags.h b/net/ssl/ssl_connection_status_flags.h
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| index d3bfed26f941c0609f4446a0d972b5205fc92146..5d806ae7d721a28e57932c0a20c13c71ebc2d8f5 100644
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| --- a/net/ssl/ssl_connection_status_flags.h
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| +++ b/net/ssl/ssl_connection_status_flags.h
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| @@ -37,7 +37,8 @@ enum {
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|  };
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|  
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|  // NOTE: the SSL version enum constants must be between 0 and
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| -// SSL_CONNECTION_VERSION_MASK, inclusive.
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| +// SSL_CONNECTION_VERSION_MASK, inclusive. These values are persisted to disk
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| +// and used in UMA, so they must remain stable.
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|  enum {
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|    SSL_CONNECTION_VERSION_UNKNOWN = 0,  // Unknown SSL version.
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|    SSL_CONNECTION_VERSION_SSL2 = 1,
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| 
 |