Independently enable recording and event callback

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/debug/trace_event.h"
 #include "base/debug/trace_event_impl.h"
@@ skipping 47 matching lines @@
                  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) {
-  while (base::debug::TraceLog::GetInstance()->IsEnabled())
-    base::debug::TraceLog::GetInstance()->SetDisabled();
+  base::debug::TraceLog::GetInstance()->SetDisabled();
   base::debug::TraceLog::GetInstance()->Flush(
       base::Bind(&BrowserShutdownProfileDumper::WriteTraceDataCollected,
                  base::Unretained(this),
                  base::Unretained(flush_complete_event)));
 }
 
 base::FilePath BrowserShutdownProfileDumper::GetFileName() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   base::FilePath trace_file =
       command_line.GetSwitchValuePath(switches::kTraceShutdownFile);
@@ skipping 50 matching lines @@
 }
 
 void BrowserShutdownProfileDumper::CloseFile() {
   if (!dump_file_)
     return;
   file_util::CloseFile(dump_file_);
   dump_file_ = NULL;
 }
 
 }  // namespace content