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

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

+// 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.
+
+#ifndef CHROME_BROWSER_UI_ANDROID_SNACKBARS_TRANSLATE_SNACKBAR_H_
+#define CHROME_BROWSER_UI_ANDROID_SNACKBARS_TRANSLATE_SNACKBAR_H_
+
+#include <stddef.h>
+
+#include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/macros.h"
+
+class TranslateSnackbar {

[gone, 2017/04/30 02:09:44]

You don't actually need this class for this CL, do you?  Plop it in when you
actually need it, since its functions aren't even defined in your CC file.

[ramyasharma, 2017/05/01 01:42:39]

Done.

[gone, 2017/05/01 02:51:51]

I meant that you didn't actually construct any instances of this class; you just
defined it but didn't implement it anywhere.  I just wanted to see if the whole
CL would still compile if you deleted just this "class TranslateSnackbar" block.

+ private:
+  TranslateSnackbar();
+  ~TranslateSnackbar();
+
+  DISALLOW_COPY_AND_ASSIGN(TranslateSnackbar);
+};
+
+// Registers the native methods through JNI.
+bool RegisterTranslateSnackbar(JNIEnv* env);
+
+#endif  // CHROME_BROWSER_UI_ANDROID_SNACKBARS_TRANSLATE_SNACKBAR_H