Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/browser_shutdown_profile_dumper.cc

 // Copyright 2013 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.
 
 #include "content/browser/browser_shutdown_profile_dumper.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
-#include "base/location.h"
 #include "base/logging.h"
-#include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "content/public/common/content_switches.h"
 
 namespace content {
 
 BrowserShutdownProfileDumper::BrowserShutdownProfileDumper(
@@ skipping 30 matching lines @@
   }
   WriteString("{\"traceEvents\":");
   WriteString("[");
 
   // TraceLog::Flush() requires the calling thread to have a message loop.
   // As the message loop of the current thread may have quit, start another
   // thread for flushing the trace.
   base::WaitableEvent flush_complete_event(false, false);
   base::Thread flush_thread("browser_shutdown_trace_event_flush");
   flush_thread.Start();
-  flush_thread.task_runner()->PostTask(
-      FROM_HERE, base::Bind(&BrowserShutdownProfileDumper::EndTraceAndFlush,
-                            base::Unretained(this),
-                            base::Unretained(&flush_complete_event)));
+  flush_thread.message_loop()->PostTask(
+      FROM_HERE,
+      base::Bind(&BrowserShutdownProfileDumper::EndTraceAndFlush,
+                 base::Unretained(this),
+                 base::Unretained(&flush_complete_event)));
 
   bool original_wait_allowed = base::ThreadRestrictions::SetWaitAllowed(true);
   flush_complete_event.Wait();
   base::ThreadRestrictions::SetWaitAllowed(original_wait_allowed);
 }
 
 void BrowserShutdownProfileDumper::EndTraceAndFlush(
     base::WaitableEvent* flush_complete_event) {
   base::trace_event::TraceLog::GetInstance()->SetDisabled();
   base::trace_event::TraceLog::GetInstance()->Flush(
@@ skipping 62 matching lines @@
 }
 
 void BrowserShutdownProfileDumper::CloseFile() {
   if (!dump_file_)
     return;
   base::CloseFile(dump_file_);
   dump_file_ = NULL;
 }
 
 }  // namespace content