Revert 123140 - Use SequencedWorkerPool for disk operations in TraceSubscriberStdio.

content/common/child_trace_message_filter.cc

Index: content/common/child_trace_message_filter.cc
===================================================================
--- content/common/child_trace_message_filter.cc	(revision 123143)
+++ content/common/child_trace_message_filter.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -72,7 +72,8 @@
 }
 
 void ChildTraceMessageFilter::OnTraceDataCollected(
-    const scoped_refptr<base::RefCountedString>& events_str_ptr) {
+    const scoped_refptr<base::debug::TraceLog::RefCountedString>&
+        events_str_ptr) {
   if (MessageLoop::current() != ChildProcess::current()->io_message_loop()) {
     ChildProcess::current()->io_message_loop()->PostTask(FROM_HERE,
         base::Bind(&ChildTraceMessageFilter::OnTraceDataCollected, this,
@@ -81,7 +82,7 @@
   }
 
   channel_->Send(new ChildProcessHostMsg_TraceDataCollected(
-    events_str_ptr->data()));
+    events_str_ptr->data));
 }
 
 void ChildTraceMessageFilter::OnTraceBufferFull() {