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

trunk/src/base/files/important_file_writer.cc

Index: trunk/src/base/files/important_file_writer.cc
===================================================================
--- trunk/src/base/files/important_file_writer.cc	(revision 269437)
+++ trunk/src/base/files/important_file_writer.cc	(working copy)
@@ -23,7 +23,6 @@
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/task_runner.h"
-#include "base/task_runner_util.h"
 #include "base/threading/thread.h"
 #include "base/time/time.h"
 
@@ -94,13 +93,13 @@
   return true;
 }
 
-ImportantFileWriter::ImportantFileWriter(const FilePath& path,
-                                         base::SequencedTaskRunner* task_runner)
-    : path_(path),
-      task_runner_(task_runner),
-      serializer_(NULL),
-      commit_interval_(TimeDelta::FromMilliseconds(kDefaultCommitIntervalMs)),
-      weak_factory_(this) {
+ImportantFileWriter::ImportantFileWriter(
+    const FilePath& path, base::SequencedTaskRunner* task_runner)
+        : path_(path),
+          task_runner_(task_runner),
+          serializer_(NULL),
+          commit_interval_(TimeDelta::FromMilliseconds(
+              kDefaultCommitIntervalMs)) {
   DCHECK(CalledOnValidThread());
   DCHECK(task_runner_.get());
 }
@@ -127,13 +126,11 @@
   if (HasPendingWrite())
     timer_.Stop();
 
-  if (!base::PostTaskAndReplyWithResult(
-          task_runner_,
+  if (!task_runner_->PostTask(
           FROM_HERE,
           MakeCriticalClosure(
-              Bind(&ImportantFileWriter::WriteFileAtomically, path_, data)),
-          Bind(&ImportantFileWriter::ForwardSuccessfulWrite,
-               weak_factory_.GetWeakPtr()))) {
+              Bind(IgnoreResult(&ImportantFileWriter::WriteFileAtomically),
+                   path_, data)))) {
     // Posting the task to background message loop is not expected
     // to fail, but if it does, avoid losing data and just hit the disk
     // on the current thread.
@@ -167,18 +164,4 @@
   serializer_ = NULL;
 }
 
-void ImportantFileWriter::RegisterOnNextSuccessfulWriteCallback(
-    const base::Closure& on_next_successful_write) {
-  DCHECK(on_next_successful_write_.is_null());
-  on_next_successful_write_ = on_next_successful_write;
-}
-
-void ImportantFileWriter::ForwardSuccessfulWrite(bool result) {
-  DCHECK(CalledOnValidThread());
-  if (result && !on_next_successful_write_.is_null()) {
-    on_next_successful_write_.Run();
-    on_next_successful_write_.Reset();
-  }
-}
-
 }  // namespace base