Remove migrateNetworkPredictionPreferences().

chrome/browser/android/preferences/pref_service_bridge.cc

Index: chrome/browser/android/preferences/pref_service_bridge.cc
diff --git a/chrome/browser/android/preferences/pref_service_bridge.cc b/chrome/browser/android/preferences/pref_service_bridge.cc
index 531fe4666d77cac89cfa39318b866ad366b744f0..9b0cc72c2f4a9e4c0642b86b92421e2dcbfd01a9 100644
--- a/chrome/browser/android/preferences/pref_service_bridge.cc
+++ b/chrome/browser/android/preferences/pref_service_bridge.cc
@@ -723,28 +723,6 @@ 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);