Add AllowNetworkPrediction preference name and enum.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index ab0b57d7afc11cb0ed5514d23b36fe4714f89d73..acea10a64af670937a38e4c8e535e5a482370f2e 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -503,8 +503,17 @@ const char kMultipleProfilePrefMigration[] =
 // of web pages, and resource prefetching.
 // NOTE: The "dns_prefetching.enabled" value is used so that historical user
 // preferences are not lost.
+// TODO(bnc): Remove kNetworkPredictionEnabled once kAllowNetworkPrediction is
+// functioning as per crbug.com/334602.
 const char kNetworkPredictionEnabled[] = "dns_prefetching.enabled";
 
+// A preference of enum chrome_browser_net::NetworkPredictionOptions shows
+// if prediction of network actions is allowed, depending on network type.
+// Actions include DNS prefetching, TCP and SSL preconnection, prerendering
+// of web pages, and resource prefetching.
+// TODO(bnc): Implement this preference as per crbug.com/334602.
+const char kAllowNetworkPrediction[] = "net.allow_network_prediction";
+
 // An integer representing the state of the default apps installation process.
 // This value is persisted in the profile's user preferences because the process
 // is async, and the user may have stopped chrome in the middle.  The next time