Update //third_party/protobuf to version 3.

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

Index: third_party/protobuf/java/src/test/java/com/google/protobuf/map_test.proto
diff --git a/third_party/protobuf/python/google/protobuf/internal/factory_test1.proto b/third_party/protobuf/java/src/test/java/com/google/protobuf/map_test.proto
similarity index 64%
copy from third_party/protobuf/python/google/protobuf/internal/factory_test1.proto
copy to third_party/protobuf/java/src/test/java/com/google/protobuf/map_test.proto
index 9f55e037f6e69ff8e76a3f260eff006af1bcce65..2280ac03b7322c59ceba481d341f818c4def8910 100644
--- a/third_party/protobuf/python/google/protobuf/internal/factory_test1.proto
+++ b/third_party/protobuf/java/src/test/java/com/google/protobuf/map_test.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
@@ -28,28 +28,36 @@
 // (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: matthewtoia@google.com (Matt Toia)
+syntax = "proto3";
 
+package map_test;
 
-package google.protobuf.python.internal;
+option java_package = "map_test";
+option java_outer_classname = "MapTestProto";
+option java_generate_equals_and_hash = true;
 
+message TestMap {
+  message MessageValue {
+    int32 value = 1;
+  }
+  enum EnumValue {
+    FOO = 0;
+    BAR = 1;
+    BAZ = 2;
+    QUX = 3;
+  }
 
-enum Factory1Enum {
-  FACTORY_1_VALUE_0 = 0;
-  FACTORY_1_VALUE_1 = 1;
+  map<int32, int32>        int32_to_int32_field = 1;
+  map<int32, string>       int32_to_string_field = 2;
+  map<int32, bytes>        int32_to_bytes_field = 3;
+  map<int32, EnumValue>    int32_to_enum_field = 4;
+  map<int32, MessageValue> int32_to_message_field = 5;
+  map<string, int32>       string_to_int32_field = 6;
 }
 
-message Factory1Message {
-  optional Factory1Enum factory_1_enum = 1;
-  enum NestedFactory1Enum {
-    NESTED_FACTORY_1_VALUE_0 = 0;
-    NESTED_FACTORY_1_VALUE_1 = 1;
-  }
-  optional NestedFactory1Enum nested_factory_1_enum = 2;
-  message NestedFactory1Message {
-    optional string value = 1;
-  }
-  optional NestedFactory1Message nested_factory_1_message = 3;
-  optional int32 scalar_value = 4;
-  repeated string list_value = 5;
+// Used to test that a nested bulider containing map fields will properly
+// propagate the onChange event and mark its parent dirty when a change
+// is made to a map field.
+message TestOnChangeEventPropagation {
+  TestMap optional_message = 1;
 }