Update //third_party/protobuf to version 3.

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

Index: third_party/protobuf/java/src/test/java/com/google/protobuf/lazy_fields_lite.proto
diff --git a/third_party/protobuf/src/google/protobuf/unittest_optimize_for.proto b/third_party/protobuf/java/src/test/java/com/google/protobuf/lazy_fields_lite.proto
similarity index 64%
copy from third_party/protobuf/src/google/protobuf/unittest_optimize_for.proto
copy to third_party/protobuf/java/src/test/java/com/google/protobuf/lazy_fields_lite.proto
index feecbef8d4a90961b35be988402e49e74fed313c..5580f72d990d7b73054cc27404bec9b378ebf3bf 100644
--- a/third_party/protobuf/src/google/protobuf/unittest_optimize_for.proto
+++ b/third_party/protobuf/java/src/test/java/com/google/protobuf/lazy_fields_lite.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
@@ -28,34 +28,44 @@
 // (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)
-//  Based on original Protocol Buffers design by
-//  Sanjay Ghemawat, Jeff Dean, and others.
+// Author: Naoki Iwasaki (niwasaki@google.com)
 //
-// A proto file which uses optimize_for = CODE_SIZE.
+// A proto file with lazy fields
 
-import "google/protobuf/unittest.proto";
+syntax = "proto2";
 
 package protobuf_unittest;
 
-option optimize_for = CODE_SIZE;
+option optimize_for = LITE_RUNTIME;
 
-message TestOptimizedForSize {
-  optional int32 i = 1;
-  optional ForeignMessage msg = 19;
+message LazyMessageLite {
+  optional int32 num = 1;
+  optional int32 num_with_default = 2 [default = 421];
+  optional LazyInnerMessageLite inner = 3 [lazy = true];
+  repeated LazyInnerMessageLite repeated_inner = 4 [lazy = true];
+
+  oneof oneof_field {
+    int32 oneof_num = 5;
+    LazyInnerMessageLite oneof_inner = 6 [lazy = true];
+  }
+}
+
+message LazyInnerMessageLite {
+  optional int32 num = 1;
+  optional int32 num_with_default = 2 [default = 42];
+  optional LazyNestedInnerMessageLite nested = 3 [lazy = true];
 
   extensions 1000 to max;
+}
 
-  extend TestOptimizedForSize {
-    optional int32 test_extension = 1234;
-    optional TestRequiredOptimizedForSize test_extension2 = 1235;
+message LazyExtension {
+  extend LazyInnerMessageLite {
+    optional LazyExtension extension = 1000;
   }
+  optional string name = 1;
 }
 
-message TestRequiredOptimizedForSize {
-  required int32 x = 1;
-}
- 
-message TestOptionalOptimizedForSize {
-  optional TestRequiredOptimizedForSize o = 1;
+message LazyNestedInnerMessageLite {
+  optional int32 num = 1;
+  optional int32 num_with_default = 2 [default = 4];
 }