More fine-grained config for 'Search result preloading' setting.

Instead of a checkbox, it's now a setting always/wifi only/never.

Bug: 5086576
Change-Id: I265a22968eafee547571dc86c10c5d5421a305e8
diff --git a/src/com/android/browser/BrowserSettings.java b/src/com/android/browser/BrowserSettings.java
index 11316ff..ce8a9c1 100644
--- a/src/com/android/browser/BrowserSettings.java
+++ b/src/com/android/browser/BrowserSettings.java
@@ -780,7 +780,20 @@
     // getter/setters for bandwidth_preferences.xml
     // -----------------------------
 
-    public boolean isPreloadEnabled() {
-        return mPrefs.getBoolean(PREF_DATA_PRELOAD, false);
+    public static String getPreloadOnWifiOnlyPreferenceString(Context context) {
+        return context.getResources().getString(R.string.pref_data_preload_value_wifi_only);
     }
+
+    public static String getPreloadAlwaysPreferenceString(Context context) {
+        return context.getResources().getString(R.string.pref_data_preload_value_always);
+    }
+
+    private String getDefaultPreloadSetting() {
+        return getPreloadOnWifiOnlyPreferenceString(mContext);
+    }
+
+    public String getPreloadEnabled() {
+        return mPrefs.getString(PREF_DATA_PRELOAD, getDefaultPreloadSetting());
+    }
+
 }