Update //third_party/protobuf to version 3.

third_party/protobuf/javanano/src/main/java/com/google/protobuf/nano/WireFormatNano.java

Index: third_party/protobuf/javanano/src/main/java/com/google/protobuf/nano/WireFormatNano.java
diff --git a/third_party/protobuf/javanano/src/main/java/com/google/protobuf/nano/WireFormatNano.java b/third_party/protobuf/javanano/src/main/java/com/google/protobuf/nano/WireFormatNano.java
new file mode 100644
index 0000000000000000000000000000000000000000..bbb6370a3e6057cf43037a01d76eeb864b5f8d02
--- /dev/null
+++ b/third_party/protobuf/javanano/src/main/java/com/google/protobuf/nano/WireFormatNano.java
@@ -0,0 +1,124 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2013 Google Inc.  All rights reserved.
+// 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
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package com.google.protobuf.nano;
+
+import java.io.IOException;
+
+/**
+ * This class is used internally by the Protocol Buffer library and generated
+ * message implementations.  It is public only because those generated messages
+ * do not reside in the {@code protobuf} package.  Others should not use this
+ * class directly.
+ *
+ * This class contains constants and helper functions useful for dealing with
+ * the Protocol Buffer wire format.
+ *
+ * @author kenton@google.com Kenton Varda
+ */
+public final class WireFormatNano {
+  // Do not allow instantiation.
+  private WireFormatNano() {}
+
+  static final int WIRETYPE_VARINT           = 0;
+  static final int WIRETYPE_FIXED64          = 1;
+  static final int WIRETYPE_LENGTH_DELIMITED = 2;
+  static final int WIRETYPE_START_GROUP      = 3;
+  static final int WIRETYPE_END_GROUP        = 4;
+  static final int WIRETYPE_FIXED32          = 5;
+
+  static final int TAG_TYPE_BITS = 3;
+  static final int TAG_TYPE_MASK = (1 << TAG_TYPE_BITS) - 1;
+
+  /** Given a tag value, determines the wire type (the lower 3 bits). */
+  static int getTagWireType(final int tag) {
+    return tag & TAG_TYPE_MASK;
+  }
+
+  /** Given a tag value, determines the field number (the upper 29 bits). */
+  public static int getTagFieldNumber(final int tag) {
+    return tag >>> TAG_TYPE_BITS;
+  }
+
+  /** Makes a tag value given a field number and wire type. */
+  static int makeTag(final int fieldNumber, final int wireType) {
+    return (fieldNumber << TAG_TYPE_BITS) | wireType;
+  }
+
+  public static final int EMPTY_INT_ARRAY[] = {};
+  public static final long EMPTY_LONG_ARRAY[] = {};
+  public static final float EMPTY_FLOAT_ARRAY[] = {};
+  public static final double EMPTY_DOUBLE_ARRAY[] = {};
+  public static final boolean EMPTY_BOOLEAN_ARRAY[] = {};
+  public static final String EMPTY_STRING_ARRAY[] = {};
+  public static final byte[] EMPTY_BYTES_ARRAY[] = {};
+  public static final byte[] EMPTY_BYTES = {};
+
+  /**
+   * Parses an unknown field. This implementation skips the field.
+   *
+   * <p>Generated messages will call this for unknown fields if the store_unknown_fields
+   * option is off.
+   *
+   * @return {@literal true} unless the tag is an end-group tag.
+   */
+  public static boolean parseUnknownField(
+      final CodedInputByteBufferNano input,
+      final int tag) throws IOException {
+    return input.skipField(tag);
+  }
+
+  /**
+   * Computes the array length of a repeated field. We assume that in the common case repeated
+   * fields are contiguously serialized but we still correctly handle interspersed values of a
+   * repeated field (but with extra allocations).
+   *
+   * Rewinds to current input position before returning.
+   *
+   * @param input stream input, pointing to the byte after the first tag
+   * @param tag repeated field tag just read
+   * @return length of array
+   * @throws IOException
+   */
+  public static final int getRepeatedFieldArrayLength(
+      final CodedInputByteBufferNano input,
+      final int tag) throws IOException {
+    int arrayLength = 1;
+    int startPos = input.getPosition();
+    input.skipField(tag);
+    while (input.readTag() == tag) {
+      input.skipField(tag);
+      arrayLength++;
+    }
+    input.rewindToPosition(startPos);
+    return arrayLength;
+  }
+
+}