Check in protobuf java code and generate lite jar.

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

Index: third_party/protobuf/java/src/main/java/com/google/protobuf/RpcCallback.java
diff --git a/third_party/protobuf/python/google/protobuf/internal/more_messages.proto b/third_party/protobuf/java/src/main/java/com/google/protobuf/RpcCallback.java
similarity index 71%
copy from third_party/protobuf/python/google/protobuf/internal/more_messages.proto
copy to third_party/protobuf/java/src/main/java/com/google/protobuf/RpcCallback.java
index c701b4460b761a7f9db44e1159a1aadf7206a64a..1fd35ed332ca34234205155bec7b1aa8f9e7751e 100644
--- a/third_party/protobuf/python/google/protobuf/internal/more_messages.proto
+++ b/third_party/protobuf/java/src/main/java/com/google/protobuf/RpcCallback.java
@@ -28,24 +28,20 @@
 // (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: robinson@google.com (Will Robinson)
+package com.google.protobuf;
 
-
-package google.protobuf.internal;
-
-// A message where tag numbers are listed out of order, to allow us to test our
-// canonicalization of serialized output, which should always be in tag order.
-// We also mix in some extensions for extra fun.
-message OutOfOrderFields {
-  optional   sint32 optional_sint32   =  5;
-  extensions 4 to 4;
-  optional   uint32 optional_uint32   =  3;
-  extensions 2 to 2;
-  optional    int32 optional_int32    =  1;
-};
-
-
-extend OutOfOrderFields {
-  optional   uint64 optional_uint64   =  4;
-  optional    int64 optional_int64    =  2;
+/**
+ * Interface for an RPC callback, normally called when an RPC completes.
+ * {@code ParameterType} is normally the method's response message type.
+ *
+ * <p>Starting with version 2.3.0, RPC implementations should not try to build
+ * on this, but should instead provide code generator plugins which generate
+ * code specific to the particular RPC implementation.  This way the generated
+ * code can be more appropriate for the implementation in use and can avoid
+ * unnecessary layers of indirection.
+ *
+ * @author kenton@google.com Kenton Varda
+ */
+public interface RpcCallback<ParameterType> {
+  void run(ParameterType parameter);
 }