[Sync] Add RequestCleanupDisabledTypes() method to SyncManager

chrome/browser/sync/engine/syncer.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_ENGINE_SYNCER_H_
 #define CHROME_BROWSER_SYNC_ENGINE_SYNCER_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 56 matching lines @@
 // the SyncerStep enum.
 //
 // A Syncer instance expects to run on a dedicated thread.  Calls
 // to SyncShare() may take an unbounded amount of time, as SyncerCommands
 // may block on network i/o, on lock contention, or on tasks posted to
 // other threads.
 class Syncer {
  public:
   typedef std::vector<int64> UnsyncedMetaHandles;
 
-  // The constructor may be called from a thread that is not the Syncer's
-  // dedicated thread, to allow some flexibility in the setup.
   Syncer();
   virtual ~Syncer();
 
   // Called by other threads to tell the syncer to stop what it's doing
   // and return early from SyncShare, if possible.
   bool ExitRequested();
   void RequestEarlyExit();
 
-  // Like SyncShare() above, but |first_step| and |last_step| are provided to
-  // perform a partial sync cycle, stopping after |last_step| is performed.
+  // Runs a sync cycle from |first_step| to |last_step|.
   virtual void SyncShare(sessions::SyncSession* session,
                          SyncerStep first_step,
                          SyncerStep last_step);
 
  private:
   // Implements the PROCESS_CLIENT_COMMAND syncer step.
   void ProcessClientCommand(sessions::SyncSession* session);
 
   bool early_exit_requested_;
   base::Lock early_exit_requested_lock_;
@@ skipping 32 matching lines @@
 };
 
 // Utility function declarations.
 void CopyServerFields(syncable::Entry* src, syncable::MutableEntry* dest);
 void ClearServerData(syncable::MutableEntry* entry);
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_SYNCER_H_