Add new Cronet exception class for QUIC errors

components/cronet/android/api/src/org/chromium/net/QuicException.java

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.net;
+
+/**
+ * Subclass of {@link UrlRequestException} (through {@link CronetException}) which contains a
+ * detailed QUIC error code from
+ * <a href=https://chromium.googlesource.com/chromium/src/+/master/net/quic/quic_protocol.h#503>
+ * this file</a>.
+ * An instance of QuicException is passed to
+ * {@link UrlRequest.Callback#onFailed UrlRequest.Callback.onFailed()} when the net error code is
+ * {@link UrlRequestException#QUIC_PROTOCOL_ERROR UrlRequestException.QUIC_PROTOCOL_ERROR}.
+ */
+public class QuicException extends CronetException {
+    // QUIC detailed error code
+    private final int mQuicDetailedErrorCode;
+
+    /**
+     * Constructs an exception with a specific error.
+     *
+     * @param message explanation of failure.
+     * @param quicDetailedErrorCode Detailed QUIC error code from
+     * <a href=https://chromium.googlesource.com/chromium/src/+/master/net/quic/quic_protocol.h#503>
+     * this file</a>.
+     */
+    public QuicException(String message, int quicDetailedErrorCode) {
+        super(message, ERROR_OTHER, QUIC_PROTOCOL_ERROR);
+        mQuicDetailedErrorCode = quicDetailedErrorCode;
+    }
+
+    /**
+     * Returns the QUIC error code, which is a value from
+     * <a href=https://chromium.googlesource.com/chromium/src/+/master/net/quic/quic_protocol.h>
+     * QuicErrorCode</a>.
+     */
+    public int getQuicDetailedErrorCode() {
+        return mQuicDetailedErrorCode;
+    }
+}