sync: add CleanupDisabledTypesCommand to purge data pertaining to previously...

chrome/browser/sync/sessions/sync_session_context.h

 // Copyright (c) 2009 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.
 
 // SyncSessionContext encapsulates the contextual information and engine
 // components specific to a SyncSession. A context is accessible via
 // a SyncSession so that session SyncerCommands and parts of the engine have
 // a convenient way to access other parts. In this way it can be thought of as
 // the surrounding environment for the SyncSession. The components of this
 // environment are either valid or not valid for the entire context lifetime,
@@ skipping 78 matching lines @@
   }
   bool notifications_enabled() { return notifications_enabled_; }
 
   // Account name, set once a directory has been opened.
   void set_account_name(const std::string name) {
     DCHECK(account_name_.empty());
     account_name_ = name;
   }
   const std::string& account_name() { return account_name_; }
 
+  const ModelSafeRoutingInfo& previous_session_routing_info() const {
+    return previous_session_routing_info_;
+  }
+
+  void set_previous_session_routing_info(const ModelSafeRoutingInfo& info) {
+    previous_session_routing_info_ = info;
+  }
+
  private:
   // Rather than force clients to set and null-out various context members, we
   // extend our encapsulation boundary to scoped helpers that take care of this
   // once they are allocated. See definitions of these below.
   friend class ScopedSessionContextConflictResolver;
   friend class ScopedSessionContextSyncerEventChannel;
 
   // These are installed by Syncer objects when needed and may be NULL.
   ConflictResolver* resolver_;
   SyncerEventChannel* syncer_event_channel_;
@@ skipping 10 matching lines @@
   // can correlate commit traffic with extension-related bookmark mutations.
   ExtensionsActivityMonitor* extensions_activity_monitor_;
 
   // Kept up to date with talk events to determine whether notifications are
   // enabled. True only if the notification channel is authorized and open.
   bool notifications_enabled_;
 
   // The name of the account being synced.
   std::string account_name_;
 
+  // Some routing info history to help us clean up types that get disabled
+  // by the user.
+  ModelSafeRoutingInfo previous_session_routing_info_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncSessionContext);
 };
 
 // Installs a ConflictResolver to a given session context for the lifetime of
 // the ScopedSessionContextConflictResolver.  There should never be more than
 // one ConflictResolver in the system, so it is an error to use this if the
 // context already has a resolver.
 class ScopedSessionContextConflictResolver {
  public:
   // Note: |context| and |resolver| should outlive |this|.
@@ skipping 30 matching lines @@
  private:
   SyncSessionContext* context_;
   SyncerEventChannel* channel_;
   DISALLOW_COPY_AND_ASSIGN(ScopedSessionContextSyncerEventChannel);
 };
 
 }  // namespace sessions
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_SESSIONS_SYNC_SESSION_CONTEXT_H_