include-what-you-use: Fix some tracing-related includes

base/test/trace_to_file.cc

 // Copyright (c) 2014 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 "base/test/trace_to_file.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
+#include "base/memory/ref_counted_memory.h"
 #include "base/run_loop.h"
 #include "base/trace_event/trace_buffer.h"
 #include "base/trace_event/trace_log.h"
 
 namespace base {
 namespace test {
 
 TraceToFile::TraceToFile() : started_(false) {
 }
 
@@ skipping 75 matching lines @@
   RunLoop run_loop;
   trace_event::TraceLog::GetInstance()->Flush(
       Bind(&OnTraceDataCollected, run_loop.QuitClosure(), Unretained(&buffer)));
   run_loop.Run();
 
   AppendFileFooter();
 }
 
 }  // namespace test
 }  // namespace base