Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_reference_types_nano.proto

Index: third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_reference_types_nano.proto
diff --git a/third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_reference_types_nano.proto b/third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_reference_types_nano.proto
deleted file mode 100644
index 82eb8d1175c00b977103b4a7c0ebeb1c2e2b74a7..0000000000000000000000000000000000000000
--- a/third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_reference_types_nano.proto
+++ /dev/null
@@ -1,116 +0,0 @@
-package protobuf_unittest;
-
-option java_package = "com.google.protobuf";
-option java_outer_classname = "NanoReferenceTypes";
-
-message TestAllTypesNano {
-
-  enum NestedEnum {
-    FOO = 1;
-    BAR = 2;
-    BAZ = 3;
-  }
-
-  message NestedMessage {
-    optional int32 foo = 1;
-  }
-
-  // Singular
-  optional    int32 optional_int32    =  1;
-  optional    int64 optional_int64    =  2;
-  optional   uint32 optional_uint32   =  3;
-  optional   uint64 optional_uint64   =  4;
-  optional   sint32 optional_sint32   =  5;
-  optional   sint64 optional_sint64   =  6;
-  optional  fixed32 optional_fixed32  =  7;
-  optional  fixed64 optional_fixed64  =  8;
-  optional sfixed32 optional_sfixed32 =  9;
-  optional sfixed64 optional_sfixed64 = 10;
-  optional    float optional_float    = 11;
-  optional   double optional_double   = 12;
-  optional     bool optional_bool     = 13;
-  optional   string optional_string   = 14;
-  optional    bytes optional_bytes    = 15;
-
-  optional group OptionalGroup = 16 {
-    optional int32 a = 17;
-  }
-
-  optional NestedMessage      optional_nested_message  = 18;
-
-  optional NestedEnum      optional_nested_enum     = 21;
-
-  optional string optional_string_piece = 24 [ctype=STRING_PIECE];
-  optional string optional_cord = 25 [ctype=CORD];
-
-  // Repeated
-  repeated    int32 repeated_int32    = 31;
-  repeated    int64 repeated_int64    = 32;
-  repeated   uint32 repeated_uint32   = 33;
-  repeated   uint64 repeated_uint64   = 34;
-  repeated   sint32 repeated_sint32   = 35;
-  repeated   sint64 repeated_sint64   = 36;
-  repeated  fixed32 repeated_fixed32  = 37;
-  repeated  fixed64 repeated_fixed64  = 38;
-  repeated sfixed32 repeated_sfixed32 = 39;
-  repeated sfixed64 repeated_sfixed64 = 40;
-  repeated    float repeated_float    = 41;
-  repeated   double repeated_double   = 42;
-  repeated     bool repeated_bool     = 43;
-  repeated   string repeated_string   = 44;
-  repeated    bytes repeated_bytes    = 45;
-
-  repeated group RepeatedGroup = 46 {
-    optional int32 a = 47;
-  }
-
-  repeated NestedMessage      repeated_nested_message  = 48;
-
-  repeated NestedEnum      repeated_nested_enum  = 51;
-
-  repeated string repeated_string_piece = 54 [ctype=STRING_PIECE];
-  repeated string repeated_cord = 55 [ctype=CORD];
-
-  // Repeated packed
-  repeated    int32 repeated_packed_int32    = 87 [packed=true];
-  repeated sfixed64 repeated_packed_sfixed64 = 88 [packed=true];
-
-  repeated NestedEnum repeated_packed_nested_enum  = 89 [packed=true];
-
-  // Singular with defaults
-  optional    int32 default_int32    = 61 [default =  41    ];
-  optional    int64 default_int64    = 62 [default =  42    ];
-  optional   uint32 default_uint32   = 63 [default =  43    ];
-  optional   uint64 default_uint64   = 64 [default =  44    ];
-  optional   sint32 default_sint32   = 65 [default = -45    ];
-  optional   sint64 default_sint64   = 66 [default =  46    ];
-  optional  fixed32 default_fixed32  = 67 [default =  47    ];
-  optional  fixed64 default_fixed64  = 68 [default =  48    ];
-  optional sfixed32 default_sfixed32 = 69 [default =  49    ];
-  optional sfixed64 default_sfixed64 = 70 [default = -50    ];
-  optional    float default_float    = 71 [default =  51.5  ];
-  optional   double default_double   = 72 [default =  52e3  ];
-  optional     bool default_bool     = 73 [default = true   ];
-  optional   string default_string   = 74 [default = "hello"];
-  optional    bytes default_bytes    = 75 [default = "world"];
-
-
-  optional  float default_float_inf      = 97  [default =  inf];
-  optional  float default_float_neg_inf  = 98  [default = -inf];
-  optional  float default_float_nan      = 99  [default =  nan];
-  optional double default_double_inf     = 100 [default =  inf];
-  optional double default_double_neg_inf = 101 [default = -inf];
-  optional double default_double_nan     = 102 [default =  nan];
-
-}
-
-message ForeignMessageNano {
-  optional int32 c = 1;
-}
-
-enum ForeignEnumNano {
-  FOREIGN_NANO_FOO = 4;
-  FOREIGN_NANO_BAR = 5;
-  FOREIGN_NANO_BAZ = 6;
-}
-