Revert of Remove migrateNetworkPredictionPreferences().

chrome/browser/android/preferences/pref_service_bridge.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/android/preferences/pref_service_bridge.h"
 
 #include <jni.h>
 
 #include "base/android/build_info.h"
 #include "base/android/jni_android.h"
@@ skipping 705 matching lines @@
 static void SetContextualSearchPreference(JNIEnv* env, jobject obj,
                                           jstring pref) {
   GetPrefService()->SetString(prefs::kContextualSearchEnabled,
       ConvertJavaStringToUTF8(env, pref));
 }
 
 static void SetNetworkPredictionOptions(JNIEnv* env, jobject obj, int option) {
   GetPrefService()->SetInteger(prefs::kNetworkPredictionOptions, option);
 }
 
+static jboolean NetworkPredictionEnabledHasUserSetting(JNIEnv* env,
+                                                       jobject obj) {
+  return GetPrefService()->GetUserPrefValue(
+      prefs::kNetworkPredictionEnabled) != NULL;
+}
+
+static jboolean NetworkPredictionOptionsHasUserSetting(JNIEnv* env,
+                                                       jobject obj) {
+  return GetPrefService()->GetUserPrefValue(
+      prefs::kNetworkPredictionOptions) != NULL;
+}
+
+static jboolean GetNetworkPredictionEnabledUserPrefValue(JNIEnv* env,
+                                                         jobject obj) {
+  const base::Value* network_prediction_enabled =
+      GetPrefService()->GetUserPrefValue(prefs::kNetworkPredictionEnabled);
+  DCHECK(network_prediction_enabled);
+  bool value = false;
+  DCHECK(network_prediction_enabled->GetAsBoolean(&value));
+  return value;
+}
+
 static void SetResolveNavigationErrorEnabled(JNIEnv* env, jobject obj,
                                              jboolean enabled) {
   GetPrefService()->SetBoolean(prefs::kAlternateErrorPagesEnabled, enabled);
 }
 
 static jboolean GetFirstRunEulaAccepted(JNIEnv* env, jobject obj) {
   return g_browser_process->local_state()->GetBoolean(prefs::kEulaAccepted);
 }
 
 static void SetEulaAccepted(JNIEnv* env, jobject obj) {
@@ skipping 119 matching lines @@
     ContentSettingsType content_type) {
   JNIEnv* env = AttachCurrentThread();
   base::android::ScopedJavaLocalRef<jstring> android_permission =
       Java_PrefServiceBridge_getAndroidPermissionForContentSetting(
           env, content_type);
   if (android_permission.is_null())
     return std::string();
 
   return ConvertJavaStringToUTF8(android_permission);
 }