Third patch in getting rid of caching MessageLoop pointers and always using C...

chrome/common/important_file_writer.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.
 
 #ifndef CHROME_COMMON_IMPORTANT_FILE_WRITER_H_
 #define CHROME_COMMON_IMPORTANT_FILE_WRITER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 30 matching lines @@
    public:
     virtual ~DataSerializer() {}
 
     // Should put serialized string in |data| and return true on successful
     // serialization. Will be called on the same thread on which
     // ImportantFileWriter has been created.
     virtual bool SerializeData(std::string* data) = 0;
   };
 
   // Initialize the writer.
-  // |path| is the name of file to write. Disk operations will be executed on
-  // |backend_thread|, or current thread if |backend_thread| is NULL.
-  //
+  // |path| is the name of file to write.
   // All non-const methods, ctor and dtor must be called on the same thread.
-  ImportantFileWriter(const FilePath& path, const base::Thread* backend_thread);
+  ImportantFileWriter(const FilePath& path);
 
   // You have to ensure that there are no pending writes at the moment
   // of destruction.
   ~ImportantFileWriter();
 
   FilePath path() const { return path_; }
 
   // Returns true if there is a scheduled write pending which has not yet
   // been started.
   bool HasPendingWrite() const;
@@ skipping 18 matching lines @@
   }
 
   void set_commit_interval(const base::TimeDelta& interval) {
     commit_interval_ = interval;
   }
 
  private:
   // Path being written to.
   const FilePath path_;
 
-  // Thread on which disk operation run. NULL means no separate thread is used.
-  const base::Thread* backend_thread_;
-
   // Timer used to schedule commit after ScheduleWrite.
   base::OneShotTimer<ImportantFileWriter> timer_;
 
   // Serializer which will provide the data to be saved.
   DataSerializer* serializer_;
 
   // Time delta after which scheduled data will be written to disk.
   base::TimeDelta commit_interval_;
 
   DISALLOW_COPY_AND_ASSIGN(ImportantFileWriter);
 };
 
 #endif  // CHROME_COMMON_IMPORTANT_FILE_WRITER_H_