Update //third_party/protobuf to version 3.

third_party/protobuf/java/src/test/java/com/google/protobuf/test_check_utf8_size.proto

Index: third_party/protobuf/java/src/test/java/com/google/protobuf/test_check_utf8_size.proto
diff --git a/third_party/protobuf/src/google/protobuf/unittest_import_lite.proto b/third_party/protobuf/java/src/test/java/com/google/protobuf/test_check_utf8_size.proto
similarity index 75%
copy from third_party/protobuf/src/google/protobuf/unittest_import_lite.proto
copy to third_party/protobuf/java/src/test/java/com/google/protobuf/test_check_utf8_size.proto
index 81b117fe8489ecc4cba5410dbf876b4ca473657b..f06d76d629fac8dba4c935c40cfb0d3bc6b771dc 100644
--- a/third_party/protobuf/src/google/protobuf/unittest_import_lite.proto
+++ b/third_party/protobuf/java/src/test/java/com/google/protobuf/test_check_utf8_size.proto
@@ -1,6 +1,6 @@
 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
-// http://code.google.com/p/protobuf/
+// https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
@@ -28,24 +28,25 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Author: kenton@google.com (Kenton Varda)
+// Author: Jacob Butcher (jbaum@google.com)
 //
-// This is like unittest_import.proto but with optimize_for = LITE_RUNTIME.
+// Test file option java_string_check_utf8.
+syntax = "proto2";
 
-package protobuf_unittest_import;
+package proto2_test_check_utf8_size;
 
-option optimize_for = LITE_RUNTIME;
+option java_outer_classname = "TestCheckUtf8Size";
+option java_string_check_utf8 = true;
+option optimize_for = CODE_SIZE;
 
-option java_package = "com.google.protobuf";
-
-import public "google/protobuf/unittest_import_public_lite.proto";
-
-message ImportMessageLite {
-  optional int32 d = 1;
+message StringWrapperSize {
+  required string req = 1;
+  optional string opt = 2;
+  repeated string rep = 3;
 }
 
-enum ImportEnumLite {
-  IMPORT_LITE_FOO = 7;
-  IMPORT_LITE_BAR = 8;
-  IMPORT_LITE_BAZ = 9;
+message BytesWrapperSize {
+  required bytes req = 1;
+  optional bytes opt = 2;
+  repeated bytes rep = 3;
 }