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

chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java

 // 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.
 
 package org.chromium.chrome.browser.infobar;
 
 import android.support.design.widget.TabLayout;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ skipping 123 matching lines @@
 
     @Override
     public void onOverflowMenuItemClicked(int itemId) {
         switch (itemId) {
             case TranslateMenu.ID_OVERFLOW_MORE_LANGUAGE:
                 mMenuHelper.show(TranslateMenu.MENU_TARGET_LANGUAGE);
                 return;
             case TranslateMenu.ID_OVERFLOW_ALWAYS_TRANSLATE:
                 nativeApplyBoolTranslateOption(
                         mNativeTranslateInfoBarPtr, TranslateOption.ALWAYS_TRANSLATE, true);
+                showSnackbar(TranslateSnackbarType.ALWAYS_TRANSLATE);
                 return;
             case TranslateMenu.ID_OVERFLOW_NEVER_LANGUAGE:
                 nativeApplyBoolTranslateOption(
                         mNativeTranslateInfoBarPtr, TranslateOption.NEVER_TRANSLATE, true);
+                showSnackbar(TranslateSnackbarType.NEVER_TRANSLATE);
                 return;
             case TranslateMenu.ID_OVERFLOW_NEVER_SITE:
                 nativeApplyBoolTranslateOption(
                         mNativeTranslateInfoBarPtr, TranslateOption.NEVER_TRANSLATE_SITE, true);
+                showSnackbar(TranslateSnackbarType.NEVER_TRANSLATE_SITE);
                 return;
             case TranslateMenu.ID_OVERFLOW_NOT_THIS_LANGUAGE:
                 mMenuHelper.show(TranslateMenu.MENU_SOURCE_LANGUAGE);
                 return;
             default:
                 assert false : "Unexpected overflow menu code";
         }
     }
 
+    private void showSnackbar(int snackbarType) {
+        // TODO(ramyasharma): Show snackbar.
+    }
+
     @Override
     public void onTargetMenuItemClicked(String code) {
         // Reset target code in both UI and native.
         if (mOptions.setTargetLanguage(code)) {
             nativeApplyStringTranslateOption(
                     mNativeTranslateInfoBarPtr, TranslateOption.TARGET_CODE, code);
             // Adjust UI.
             mTabLayout.replaceTabTitle(TARGET_TAB_INDEX, mOptions.getRepresentationFromCode(code));
             startTranslating(mTabLayout.getSelectedTabPosition());
         }
     }
 
     @Override
     public void onSourceMenuItemClicked(String code) {
         // Reset source code in both UI and native.
         if (mOptions.setSourceLanguage(code)) {
             nativeApplyStringTranslateOption(
                     mNativeTranslateInfoBarPtr, TranslateOption.SOURCE_CODE, code);
             // Adjust UI.
             mTabLayout.replaceTabTitle(SOURCE_TAB_INDEX, mOptions.getRepresentationFromCode(code));
             startTranslating(mTabLayout.getSelectedTabPosition());
         }
     }
 
     private native void nativeApplyStringTranslateOption(
             long nativeTranslateCompactInfoBar, int option, String value);
     private native void nativeApplyBoolTranslateOption(
             long nativeTranslateCompactInfoBar, int option, boolean value);
 }