Remove NETWORK_PREDICTION_UNSET.

chrome/browser/net/prediction_options.cc

Index: chrome/browser/net/prediction_options.cc
diff --git a/chrome/browser/net/prediction_options.cc b/chrome/browser/net/prediction_options.cc
index a01f5ee1144643b4286932f7b0a086fb73a7719e..f5253884a116fcbc0fb2a490bef74ceb0aa70e8c 100644
--- a/chrome/browser/net/prediction_options.cc
+++ b/chrome/browser/net/prediction_options.cc
@@ -12,56 +12,38 @@
 #include "content/public/browser/browser_thread.h"
 #include "net/base/network_change_notifier.h"
 
+namespace chrome_browser_net {
+
 namespace {
 
 // Since looking up preferences and current network connection are presumably
 // both cheap, we do not cache them here.
-bool CanPrefetchAndPrerender(int network_prediction_options,
-                             bool network_prediction_enabled) {
+bool CanPrefetchAndPrerender(int network_prediction_options) {
   switch (network_prediction_options) {
-    case chrome_browser_net::NETWORK_PREDICTION_ALWAYS:
+    case NETWORK_PREDICTION_ALWAYS:
       return true;
-    case chrome_browser_net::NETWORK_PREDICTION_WIFI_ONLY:
-      return !net::NetworkChangeNotifier::IsConnectionCellular(
-          net::NetworkChangeNotifier::GetConnectionType());
-    case chrome_browser_net::NETWORK_PREDICTION_NEVER:
+    case NETWORK_PREDICTION_NEVER:
       return false;
-    case chrome_browser_net::NETWORK_PREDICTION_UNSET:
-      return network_prediction_enabled;
     default:
-      NOTREACHED() << "Unknown kNetworkPredictionOptions value.";
-      return false;
+      DCHECK_EQ(NETWORK_PREDICTION_WIFI_ONLY, network_prediction_options);
+      return !net::NetworkChangeNotifier::IsConnectionCellular(
+                 net::NetworkChangeNotifier::GetConnectionType());
   }
 }
 
-bool CanPreresolveAndPreconnect(int network_prediction_options,
-                                bool network_prediction_enabled) {
-  switch (network_prediction_options) {
-    case chrome_browser_net::NETWORK_PREDICTION_ALWAYS:
-      return true;
-    // DNS preresolution and TCP preconnect are performed even on cellular
-    // networks if the user setting is WIFI_ONLY.
-    case chrome_browser_net::NETWORK_PREDICTION_WIFI_ONLY:
-      return true;
-    case chrome_browser_net::NETWORK_PREDICTION_NEVER:
-      return false;
-    case chrome_browser_net::NETWORK_PREDICTION_UNSET:
-      return network_prediction_enabled;
-    default:
-      NOTREACHED() << "Unknown kNetworkPredictionOptions value.";
-      return false;
-  }
+bool CanPreresolveAndPreconnect(int network_prediction_options) {
+  // DNS preresolution and TCP preconnect are performed even on cellular
+  // networks if the user setting is WIFI_ONLY.
+  return network_prediction_options != NETWORK_PREDICTION_NEVER;
 }
 
 }  // namespace
 
-namespace chrome_browser_net {
-
 void RegisterPredictionOptionsProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterIntegerPref(
       prefs::kNetworkPredictionOptions,
-      chrome_browser_net::NETWORK_PREDICTION_UNSET,
+      NETWORK_PREDICTION_DEFAULT,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
@@ -81,8 +63,7 @@ void MigrateNetworkPredictionUserPrefs(PrefService* pref_service) {
   if (network_prediction_enabled->GetAsBoolean(&value)) {
     pref_service->SetInteger(
         prefs::kNetworkPredictionOptions,
-        value ? chrome_browser_net::NETWORK_PREDICTION_WIFI_ONLY
-              : chrome_browser_net::NETWORK_PREDICTION_NEVER);
+        value ? NETWORK_PREDICTION_WIFI_ONLY : NETWORK_PREDICTION_NEVER);
   }
 }
 
@@ -90,16 +71,14 @@ bool CanPrefetchAndPrerenderIO(ProfileIOData* profile_io_data) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
   DCHECK(profile_io_data);
   return CanPrefetchAndPrerender(
-      profile_io_data->network_prediction_options()->GetValue(),
-      profile_io_data->network_prediction_enabled()->GetValue());
+      profile_io_data->network_prediction_options()->GetValue());
 }
 
 bool CanPrefetchAndPrerenderUI(PrefService* prefs) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   DCHECK(prefs);
   return CanPrefetchAndPrerender(
-      prefs->GetInteger(prefs::kNetworkPredictionOptions),
-      prefs->GetBoolean(prefs::kNetworkPredictionEnabled));
+      prefs->GetInteger(prefs::kNetworkPredictionOptions));
 }
 
 bool CanPredictNetworkActionsUI(PrefService* prefs) {
@@ -110,16 +89,14 @@ bool CanPreresolveAndPreconnectIO(ProfileIOData* profile_io_data) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
   DCHECK(profile_io_data);
   return CanPreresolveAndPreconnect(
-      profile_io_data->network_prediction_options()->GetValue(),
-      profile_io_data->network_prediction_enabled()->GetValue());
+      profile_io_data->network_prediction_options()->GetValue());
 }
 
 bool CanPreresolveAndPreconnectUI(PrefService* prefs) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
   DCHECK(prefs);
   return CanPreresolveAndPreconnect(
-      prefs->GetInteger(prefs::kNetworkPredictionOptions),
-      prefs->GetBoolean(prefs::kNetworkPredictionEnabled));
+      prefs->GetInteger(prefs::kNetworkPredictionOptions));
 }
 
 }  // namespace chrome_browser_net