[Android] Java Bridge with Gin: implement Java Bridge dispatcher

content/common/android/gin_java_bridge_errors.h

+// Copyright 2014 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.
+
+#ifndef CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_ERRORS_H_
+#define CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_ERRORS_H_
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+enum GinJavaBridgeError {
+  kGinJavaBridgeNoError = 0,
+  kGinJavaBridgeUnknownObjectId,
+  kGinJavaBridgeObjectIsGone,
+  kGinJavaBridgeMethodNotFound,
+  kGinJavaBridgeAccessToObjectGetClassIsBlocked,
+  kGinJavaBridgeJavaExceptionRaised,
+};
+
+CONTENT_EXPORT const char* GinJavaBridgeErrorToString(GinJavaBridgeError error);
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_ERRORS_H_