Build NetError.java to use in java side tests by preprocessing net_errors.cc

net/android/java/net_errors_java.template

Index: net/android/java/net_errors_java.template
diff --git a/media/base/audio_renderer.cc b/net/android/java/net_errors_java.template
similarity index 62%
copy from media/base/audio_renderer.cc
copy to net/android/java/net_errors_java.template
index e7b737ece5e1cbbd1f44cd3ebc1b15209ee9169a..1da7031e3ed1066c996d82ce8234131e87832dcc 100644
--- a/media/base/audio_renderer.cc
+++ b/net/android/java/net_errors_java.template
@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/base/audio_renderer.h"
+package org.chromium.net;
 
-namespace media {
+public class NetError {
+#define NET_ERROR(name, value) public static int ERR_##name = value;
+#include "net/base/net_error_list.h"
+}
 
-AudioRenderer::AudioRenderer() {}
-AudioRenderer::~AudioRenderer() {}
-
-}  // namespace media