Revert 269415 "Introduce a new framework for back-and-forth trac..."

trunk/src/base/files/important_file_writer.h

Index: trunk/src/base/files/important_file_writer.h
===================================================================
--- trunk/src/base/files/important_file_writer.h	(revision 269437)
+++ trunk/src/base/files/important_file_writer.h	(working copy)
@@ -9,7 +9,6 @@
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
-#include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
@@ -90,11 +89,6 @@
   // Serialize data pending to be saved and execute write on backend thread.
   void DoScheduledWrite();
 
-  // Registers |on_next_successful_write| to be called once, on the next
-  // successful write event. Only one callback can be set at once.
-  void RegisterOnNextSuccessfulWriteCallback(
-      const base::Closure& on_next_successful_write);
-
   TimeDelta commit_interval() const {
     return commit_interval_;
   }
@@ -104,13 +98,6 @@
   }
 
  private:
-  // If |result| is true and |on_next_successful_write_| is set, invokes
-  // |on_successful_write_| and then resets it; no-ops otherwise.
-  void ForwardSuccessfulWrite(bool result);
-
-  // Invoked once and then reset on the next successful write event.
-  base::Closure on_next_successful_write_;
-
   // Path being written to.
   const FilePath path_;
 
@@ -126,8 +113,6 @@
   // Time delta after which scheduled data will be written to disk.
   TimeDelta commit_interval_;
 
-  WeakPtrFactory<ImportantFileWriter> weak_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(ImportantFileWriter);
 };