Update //third_party/protobuf to version 3.

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

Index: third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_extension_repeated_nano.proto
diff --git a/third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_extension_repeated_nano.proto b/third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_extension_repeated_nano.proto
new file mode 100644
index 0000000000000000000000000000000000000000..e533c65b43c020f9a3dd4c19e4f18984a497d395
--- /dev/null
+++ b/third_party/protobuf/javanano/src/test/java/com/google/protobuf/nano/unittest_extension_repeated_nano.proto
@@ -0,0 +1,34 @@
+syntax = "proto2";
+
+option java_multiple_files = true;
+option java_package = "com.google.protobuf";
+
+import "google/protobuf/nano/unittest_extension_nano.proto";
+
+// Must be compiled separately due to extension number reuse.
+// The reuse is deliberate, for testing wire compatibility.
+
+message RepeatedExtensions {
+  extend ExtendableMessage {
+    repeated int32          repeated_int32    = 10;
+    repeated uint32         repeated_uint32   = 11;
+    repeated sint32         repeated_sint32   = 12;
+    repeated int64          repeated_int64    = 13;
+    repeated uint64         repeated_uint64   = 14;
+    repeated sint64         repeated_sint64   = 15;
+    repeated fixed32        repeated_fixed32  = 16;
+    repeated sfixed32       repeated_sfixed32 = 17;
+    repeated fixed64        repeated_fixed64  = 18;
+    repeated sfixed64       repeated_sfixed64 = 19;
+    repeated bool           repeated_bool     = 20;
+    repeated float          repeated_float    = 21;
+    repeated double         repeated_double   = 22;
+    repeated AnEnum         repeated_enum     = 23;
+    repeated string         repeated_string   = 24;
+    repeated bytes          repeated_bytes    = 25;
+    repeated AnotherMessage repeated_message  = 26;
+    repeated group          RepeatedGroup     = 27 {
+      optional int32 a = 1;
+    }
+  }
+}