Update //third_party/protobuf to version 3.

third_party/protobuf/java/src/main/java/com/google/protobuf/ProtocolMessageEnum.java

Index: third_party/protobuf/java/src/main/java/com/google/protobuf/ProtocolMessageEnum.java
diff --git a/third_party/protobuf/python/google/protobuf/internal/test_bad_identifiers.proto b/third_party/protobuf/java/src/main/java/com/google/protobuf/ProtocolMessageEnum.java
similarity index 67%
copy from third_party/protobuf/python/google/protobuf/internal/test_bad_identifiers.proto
copy to third_party/protobuf/java/src/main/java/com/google/protobuf/ProtocolMessageEnum.java
index 6a82299a52b7ada13f12f03de89ba68b2d0ceca7..0c8df9899736430e84ed7da6d0018263c90aca63 100644
--- a/third_party/protobuf/python/google/protobuf/internal/test_bad_identifiers.proto
+++ b/third_party/protobuf/java/src/main/java/com/google/protobuf/ProtocolMessageEnum.java
@@ -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
@@ -28,25 +28,31 @@
 // (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)
+package com.google.protobuf;
 
+import com.google.protobuf.Descriptors.EnumDescriptor;
+import com.google.protobuf.Descriptors.EnumValueDescriptor;
 
-package protobuf_unittest;
+/**
+ * Interface of useful methods added to all enums generated by the protocol
+ * compiler.
+ */
+public interface ProtocolMessageEnum extends Internal.EnumLite {
 
-option py_generic_services = true;
+  /**
+   * Return the value's numeric value as defined in the .proto file.
+   */
+  int getNumber();
 
-message TestBadIdentifiers {
-  extensions 100 to max;
-}
+  /**
+   * Return the value's descriptor, which contains information such as
+   * value name, number, and type.
+   */
+  EnumValueDescriptor getValueDescriptor();
 
-// Make sure these reasonable extension names don't conflict with internal
-// variables.
-extend TestBadIdentifiers {
-  optional string message = 100 [default="foo"];
-  optional string descriptor = 101 [default="bar"];
-  optional string reflection = 102 [default="baz"];
-  optional string service = 103 [default="qux"];
+  /**
+   * Return the enum type's descriptor, which contains information
+   * about each defined value, etc.
+   */
+  EnumDescriptor getDescriptorForType();
 }
-
-message AnotherMessage {}
-service AnotherService {}