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 edf2729a9dad6c6042cf9471e93b82b74707551b..ed1089ba42755048296b0d65404682c4393bb3e3 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -497,8 +497,17 @@ 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[] = "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