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;

[newt (away), 2015/09/01 18:44:39]

Is kNetworkPredictionEnabled still used on other platforms? Can it be removed?

[Bence, 2015/09/01 20:39:59]

Yes, it is still used on other platforms.  It will be removed in the follow-up
CL https://crrev.com/1320613006, which currently does not build exactly because
it removes kNetworkPredictionEnabled but does not touch the Android-specific
part.

-}
-
-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);
 }