Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/util/internal/object_source.h

Index: third_party/protobuf/src/google/protobuf/util/internal/object_source.h
diff --git a/third_party/protobuf/src/google/protobuf/compiler/java/java_extension.h b/third_party/protobuf/src/google/protobuf/util/internal/object_source.h
similarity index 57%
copy from third_party/protobuf/src/google/protobuf/compiler/java/java_extension.h
copy to third_party/protobuf/src/google/protobuf/util/internal/object_source.h
index 009ed9ffacaf207d4fb6322dca43697499b32991..2c31cfb09e77215783d96813b78477b881cd96ec 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/java/java_extension.h
+++ b/third_party/protobuf/src/google/protobuf/util/internal/object_source.h
@@ -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
@@ -28,50 +28,52 @@
 // (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.
-
-#ifndef GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__
-#define GOOGLE_PROTOBUF_COMPILER_JAVA_EXTENSION_H__
-
-#include <string>
+#ifndef GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_SOURCE_H__
+#define GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_SOURCE_H__
 
 #include <google/protobuf/stubs/common.h>
+#include <google/protobuf/stubs/stringpiece.h>
+#include <google/protobuf/stubs/status.h>
 
 namespace google {
 namespace protobuf {
-  class FieldDescriptor;       // descriptor.h
-  namespace io {
-    class Printer;             // printer.h
-  }
-}
+namespace util {
+namespace converter {
 
-namespace protobuf {
-namespace compiler {
-namespace java {
+class ObjectWriter;
 
-// Generates code for an extension, which may be within the scope of some
-// message or may be at file scope.  This is much simpler than FieldGenerator
-// since extensions are just simple identifiers with interesting types.
-class ExtensionGenerator {
+// An ObjectSource is anything that can write to an ObjectWriter.
+// Implementation of this interface typically provide constructors or
+// factory methods to create an instance based on some source data, for
+// example, a character stream, or protobuf.
+//
+// Derived classes could be thread-unsafe.
+class LIBPROTOBUF_EXPORT ObjectSource {
  public:
-  explicit ExtensionGenerator(const FieldDescriptor* descriptor);
-  ~ExtensionGenerator();
+  virtual ~ObjectSource() {}
+
+  // Writes to the ObjectWriter
+  virtual util::Status WriteTo(ObjectWriter* ow) const {
+    return NamedWriteTo("", ow);
+  }
+
+  // Writes to the ObjectWriter with a custom name for the message.
+  // This is useful when you chain ObjectSource together by embedding one
+  // within another.
+  virtual util::Status NamedWriteTo(StringPiece name,
+                                      ObjectWriter* ow) const = 0;
 
-  void Generate(io::Printer* printer);
-  void GenerateNonNestedInitializationCode(io::Printer* printer);
-  void GenerateRegistrationCode(io::Printer* printer);
+ protected:
+  ObjectSource() {}
 
  private:
-  const FieldDescriptor* descriptor_;
-  string scope_;
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator);
+  // Do not add any data members to this class.
+  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ObjectSource);
 };
 
-}  // namespace java
-}  // namespace compiler
+}  // namespace converter
+}  // namespace util
 }  // namespace protobuf
 
 }  // namespace google
-#endif  // GOOGLE_PROTOBUF_COMPILER_JAVA_MESSAGE_H__
+#endif  // GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_SOURCE_H__