Introduces snackbar enum, & other snackbar classes on android for translate

chrome/browser/ui/android/snackbars/translate_snackbar.cc

+// Copyright 2017 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.
+
+#include "chrome/browser/ui/android/snackbars/translate_snackbar.h"
+
+#include "base/memory/ptr_util.h"
+#include "jni/TranslateSnackbarController_jni.h"
+
+// static
+static void ToggleTranslateOption(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& obj,
+    int snackbar_type) {
+  // TODO(ramyasharma): Implement.
+}
+
+// Native JNI methods -------------------------------------------------------
+
+// static
+bool RegisterTranslateSnackbar(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}