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"
+
+TranslateSnackbar::TranslateSnackbar(int snackbar_type) {
+  type = snackbar_type;
+}
+
+void TranslateSnackbar::ToggleTranslateOption(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj) {
+  // TODO(ramyasharma): Implement.

[gone, 2017/04/26 17:19:51]

You don't actually need to create this object, do you?  This could just be a
static function that gets passed the snackbar_type from the java side when it
needs to do whatever it needs to do.

[ramyasharma, 2017/04/27 08:01:42]

That is correct as of now. However, hopefully in the next couple of CLs I will
be adding the translate delegate as a member function, which will be set in the
constructor. Hence following this approach. 

+}
+
+// Native JNI methods -------------------------------------------------------
+
+// static
+bool RegisterTranslateSnackbar(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}