Add AllowNetworkPrediction preference name and enum.

BUG=334602

Review URL: https://codereview.chromium.org/336543003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278789 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 19 insertions, 0 deletions

diff --git a/chrome/browser/net/predictor.h b/chrome/browser/net/predictor.h
index 3234e17..3a747d8 100644
--- a/chrome/browser/net/predictor.h
+++ b/chrome/browser/net/predictor.h
@@ -80,6 +80,15 @@ class PredictorObserver {
 // the IO thread.
 class Predictor {
  public:
+  // Enum describing when to allow network predictions based on connection type.
+  // The same enum must be used by the platform-dependent components.
+  // TODO(bnc): implement as per crbug.com/334602.
+  enum NetworkPredictionOptions {
+    NETWORK_PREDICTION_ALWAYS,
+    NETWORK_PREDICTION_WIFI_ONLY,
+    NETWORK_PREDICTION_NEVER
+  };
+
   // A version number for prefs that are saved. This should be incremented when
   // we change the format so that we discard old data.
   static const int kPredictorReferrerVersion;
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 7f23dca..85e68af 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -507,8 +507,17 @@ 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
diff --git a/chrome/common/pref_names.h b/chrome/common/pref_names.h
index fc6ddd8..7168b35 100644
--- a/chrome/common/pref_names.h
+++ b/chrome/common/pref_names.h
@@ -182,6 +182,7 @@ extern const char kLastPolicyCheckTime[];
 extern const char kInstantUIZeroSuggestUrlPrefix[];
 extern const char kMultipleProfilePrefMigration[];
 extern const char kNetworkPredictionEnabled[];
+extern const char kAllowNetworkPrediction[];
 extern const char kDefaultAppsInstallState[];
 extern const char kHideWebStoreIcon[];
 #if defined(OS_CHROMEOS)