Update //third_party/protobuf to version 3.

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

Index: third_party/protobuf/java/src/main/java/com/google/protobuf/ProtobufArrayList.java
diff --git a/third_party/protobuf/src/google/protobuf/unittest_mset.proto b/third_party/protobuf/java/src/main/java/com/google/protobuf/ProtobufArrayList.java
similarity index 52%
copy from third_party/protobuf/src/google/protobuf/unittest_mset.proto
copy to third_party/protobuf/java/src/main/java/com/google/protobuf/ProtobufArrayList.java
index 3497f09fa6d41b7b38357e7f2610dfb5c087d3e4..d2f82ac5135b3664770afc8968c6fd5873541f70 100644
--- a/third_party/protobuf/src/google/protobuf/unittest_mset.proto
+++ b/third_party/protobuf/java/src/main/java/com/google/protobuf/ProtobufArrayList.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
@@ -28,45 +28,72 @@
 // (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.
-//
-// This file contains messages for testing message_set_wire_format.
-
-package protobuf_unittest;
+package com.google.protobuf;
 
-option optimize_for = SPEED;
+import com.google.protobuf.Internal.ProtobufList;
 
-// A message with message_set_wire_format.
-message TestMessageSet {
-  option message_set_wire_format = true;
-  extensions 4 to max;
-}
+import java.util.ArrayList;
+import java.util.List;
 
-message TestMessageSetContainer {
-  optional TestMessageSet message_set = 1;
-}
+/**
+ * Implements {@link ProtobufList} for non-primitive and {@link String} types.
+ */
+class ProtobufArrayList<E> extends AbstractProtobufList<E> {
 
-message TestMessageSetExtension1 {
-  extend TestMessageSet {
-    optional TestMessageSetExtension1 message_set_extension = 1545008;
+  private static final ProtobufArrayList<Object> EMPTY_LIST = new ProtobufArrayList<Object>();
+  static {
+    EMPTY_LIST.makeImmutable();
+  }
+  
+  @SuppressWarnings("unchecked") // Guaranteed safe by runtime.
+  public static <E> ProtobufArrayList<E> emptyList() {
+    return (ProtobufArrayList<E>) EMPTY_LIST;
+  }
+  
+  private final List<E> list;
+  
+  ProtobufArrayList() {
+    list = new ArrayList<E>();
+  }
+  
+  ProtobufArrayList(List<E> toCopy) {
+    list = new ArrayList<E>(toCopy);
+  }
+  
+  ProtobufArrayList(int capacity) {
+    list = new ArrayList<E>(capacity);
+  }
+  
+  @Override
+  public void add(int index, E element) {
+    ensureIsMutable();
+    list.add(index, element);
+    modCount++;
   }
-  optional int32 i = 15;
-}
 
-message TestMessageSetExtension2 {
-  extend TestMessageSet {
-    optional TestMessageSetExtension2 message_set_extension = 1547769;
+  @Override
+  public E get(int index) {
+    return list.get(index);
+  }
+  
+  @Override
+  public E remove(int index) {
+    ensureIsMutable();
+    E toReturn = list.remove(index);
+    modCount++;
+    return toReturn;
+  }
+  
+  @Override
+  public E set(int index, E element) {
+    ensureIsMutable();
+    E toReturn = list.set(index, element);
+    modCount++;
+    return toReturn;
   }
-  optional string str = 25;
-}
 
-// MessageSet wire format is equivalent to this.
-message RawMessageSet {
-  repeated group Item = 1 {
-    required int32 type_id = 2;
-    required bytes message = 3;
+  @Override
+  public int size() {
+    return list.size();
   }
 }
-