[subresource_filter] Add Page Info subtitle on desktop + placeholder string

chrome/android/java/src/org/chromium/chrome/browser/page_info/PageInfoPopup.java

 // Copyright 2013 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.page_info;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
@@ skipping 605 matching lines @@
                 permissionIcon.setImageResource(R.drawable.exclamation_triangle);
                 permissionIcon.setColorFilter(ApiCompatibilityUtils.getColor(
                         mContext.getResources(), R.color.page_info_popup_text_link));
 
                 permissionRow.setOnClickListener(this);
             }
         }
 
         // The subresource filter permission requires an additional static subtitle.
         if (permission.type == ContentSettingsType.CONTENT_SETTINGS_TYPE_SUBRESOURCE_FILTER) {
-            TextView permissionUnavailable =
+            TextView permissionSubtitle =
                     (TextView) permissionRow.findViewById(R.id.page_info_permission_subtitle);
-            permissionUnavailable.setVisibility(View.VISIBLE);
-            permissionUnavailable.setText(R.string.subresource_filter_permission_title);
+            permissionSubtitle.setVisibility(View.VISIBLE);
+            permissionSubtitle.setText(R.string.page_info_permission_subresource_filter_subtitle);
         }
 
         TextView permissionStatus = (TextView) permissionRow.findViewById(
                 R.id.page_info_permission_status);
         SpannableStringBuilder builder = new SpannableStringBuilder();
         SpannableString nameString = new SpannableString(permission.name);
         final StyleSpan boldSpan = new StyleSpan(android.graphics.Typeface.BOLD);
         nameString.setSpan(boldSpan, 0, nameString.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
 
         builder.append(nameString);
@@ skipping 374 matching lines @@
         new PageInfoPopup(activity, tab, offlinePageCreationDate, contentPublisher);
     }
 
     private static native long nativeInit(PageInfoPopup popup, WebContents webContents);
 
     private native void nativeDestroy(long nativePageInfoPopupAndroid);
 
     private native void nativeRecordPageInfoAction(
             long nativePageInfoPopupAndroid, int action);
 }