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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef SYNC_UTIL_EXPERIMENTS_
      6 #define SYNC_UTIL_EXPERIMENTS_
      7 
      8 #include <string>
      9 
     10 #include "sync/internal_api/public/base/model_type.h"
     11 
     12 namespace syncer {
     13 
     14 const char kFaviconSyncTag[] = "favicon_sync";
     15 const char kPreCommitUpdateAvoidanceTag[] = "pre_commit_update_avoidance";
     16 const char kGCMChannelTag[] = "gcm_channel";
     17 const char kEnhancedBookmarksTag[] = "enhanced_bookmarks";
     18 const char kGCMInvalidationsTag[] = "gcm_invalidations";
     19 
     20 // A structure to hold the enable status of experimental sync features.
     21 struct Experiments {
     22   enum GCMChannelState {
     23     UNSET,
     24     SUPPRESSED,
     25     ENABLED,
     26   };
     27 
     28   Experiments()
     29       : favicon_sync_limit(200),
     30         gcm_channel_state(UNSET),
     31         enhanced_bookmarks_enabled(false),
     32         gcm_invalidations_enabled(true)  // By default GCM channel is enabled.
     33   {}
     34 
     35   bool Matches(const Experiments& rhs) {
     36     return (favicon_sync_limit == rhs.favicon_sync_limit &&
     37             gcm_channel_state == rhs.gcm_channel_state &&
     38             enhanced_bookmarks_enabled == rhs.enhanced_bookmarks_enabled &&
     39             enhanced_bookmarks_ext_id == rhs.enhanced_bookmarks_ext_id &&
     40             gcm_invalidations_enabled == rhs.gcm_invalidations_enabled);
     41   }
     42 
     43   // The number of favicons that a client is permitted to sync.
     44   int favicon_sync_limit;
     45 
     46   // Enable state of the GCM channel.
     47   GCMChannelState gcm_channel_state;
     48 
     49   // Enable the enhanced bookmarks sync datatype.
     50   bool enhanced_bookmarks_enabled;
     51 
     52   // Enable invalidations over GCM channel.
     53   bool gcm_invalidations_enabled;
     54 
     55   // Enhanced bookmarks extension id.
     56   std::string enhanced_bookmarks_ext_id;
     57 };
     58 
     59 }  // namespace syncer
     60 
     61 #endif  // SYNC_UTIL_EXPERIMENTS_
     62