[ImportantStorage] Clear button string update and lint fixes.

chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/ConfirmImportantSitesDialogFragment.java

 // Copyright 2016 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.preferences.privacy;
 
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.app.Dialog;
 import android.app.DialogFragment;
@@ skipping 262 matching lines @@
         // We create our own ListView, as AlertDialog doesn't let us set a message and a list
         // adapter at the same time.
         View messageAndListView = getActivity().getLayoutInflater().inflate(
                 R.layout.clear_browsing_important_dialog_listview, null);
         mSitesListView = (ListView) messageAndListView.findViewById(R.id.select_dialog_listview);
         mSitesListView.setAdapter(mAdapter);
         mSitesListView.setOnItemClickListener(mAdapter);
         final AlertDialog.Builder builder =
                 new AlertDialog.Builder(getActivity(), R.style.AlertDialogTheme)
                         .setTitle(R.string.storage_clear_site_storage_title)
-                        .setPositiveButton(R.string.clear_data_delete, listener)
+                        .setPositiveButton(R.string.clear_browsing_data_important_dialog_button,
+                                listener)
                         .setNegativeButton(R.string.cancel, listener)
                         .setView(messageAndListView);
         mDialog = builder.create();
 
         return mDialog;
     }
 }