Add possibility to divide chrome users into groups of equal size, and change ...

chrome/common/pref_names.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/pref_names.h"
 
 namespace prefs {
 
 // *************** PROFILE PREFS ***************
 // These are attached to the user profile
@@ skipping 1004 matching lines @@
 const char kNTPShownSections[] = "ntp.shown_sections";
 
 // This pref is used for migrating the prefs for the NTP
 const char kNTPPrefVersion[] = "ntp.pref_version";
 
 // Dates between which the NTP should show a custom logo rather than the
 // standard one.
 const char kNTPCustomLogoStart[] = "ntp.alt_logo_start";
 const char kNTPCustomLogoEnd[] = "ntp.alt_logo_end";
 
+// Whether promo should be shown to Dev builds, Beta and Dev, or all builds.
+const char kNTPPromoBuild[] = "ntp.promo_build";
+
+// True if user has explicitly closed the promo line.
+const char kNTPPromoClosed[] = "ntp.promo_closed";
+
+// Users are randomly divided into 16 groups in order to slowly roll out
+// special promos.
+const char kNTPPromoGroup[] = "ntp.promo_group";
+
+// Amount of time each promo group should be shown a promo that is being slowly
+// rolled out, in hours.
+const char kNTPPromoGroupTimeSlice[] = "ntp.promo_group_timeslice";
+
+// Promo line from server.
+const char kNTPPromoLine[] = "ntp.promo_line";
+
 // Dates between which the NTP should show a promotional line downloaded
 // from the promo server.
 const char kNTPPromoStart[] = "ntp.promo_start";
 const char kNTPPromoEnd[] = "ntp.promo_end";
 
-// Promo line from server.
-const char kNTPPromoLine[] = "ntp.promo_line";
-
-// True if user has explicitly closed the promo line.
-const char kNTPPromoClosed[] = "ntp.promo_closed";
-
 const char kDevToolsDisabled[] = "devtools.disabled";
 
 // A boolean specifying whether dev tools window should be opened docked.
 const char kDevToolsOpenDocked[] = "devtools.open_docked";
 
 // Integer location of the split bar in the browser view.
 const char kDevToolsSplitLocation[] = "devtools.split_location";
 
 // 64-bit integer serialization of the base::Time when the last sync occurred.
 const char kSyncLastSyncedTime[] = "sync.last_synced_time";
@@ skipping 143 matching lines @@
 const char kManagedDefaultPluginsSetting[] =
     "profile.managed_default_content_settings.plugins";
 const char kManagedDefaultPopupsSetting[] =
     "profile.managed_default_content_settings.popups";
 
 // Dictionary for storing the set of known background pages (keys are extension
 // IDs of background page owners, value is a boolean that is true if the user
 // needs to acknowledge this page.
 const char kKnownBackgroundPages[] = "background_pages.known";
 }  // namespace prefs