Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/src/google/protobuf/compiler/java/java_file.h

Index: third_party/protobuf/src/google/protobuf/compiler/java/java_file.h
diff --git a/third_party/protobuf/src/google/protobuf/compiler/java/java_file.h b/third_party/protobuf/src/google/protobuf/compiler/java/java_file.h
index 080b342412ee8e99ccdadb363ae671b31f55cb7b..7dbeb94eaf0cb1e0384c80b802561d76e597d6d0 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/java/java_file.h
+++ b/third_party/protobuf/src/google/protobuf/compiler/java/java_file.h
@@ -67,7 +67,8 @@ namespace java {
 
 class FileGenerator {
  public:
-  FileGenerator(const FileDescriptor* file, bool immutable_api = true);
+  FileGenerator(const FileDescriptor* file, bool immutable_api = true,
+                bool enforce_lite = false);
   ~FileGenerator();
 
   // Checks for problems that would otherwise lead to cryptic compile errors.