Call logging::InitLogging. The lack of this was causing some hangs (and poss...

base/perftimer.cc

 // Copyright (c) 2006-2008 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/perftimer.h"
 
 #include <stdio.h>
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 
 static FILE* perf_log_file = NULL;
 
-bool InitPerfLog(const char* log_file) {
+bool InitPerfLog(const FilePath& log_file) {
   if (perf_log_file) {
     // trying to initialize twice
     NOTREACHED();
     return false;
   }
 
-  perf_log_file = file_util::OpenFile(std::string(log_file), "w");
+  perf_log_file = file_util::OpenFile(log_file, "w");
   return perf_log_file != NULL;
 }
 
 void FinalizePerfLog() {
   if (!perf_log_file) {
     // trying to cleanup without initializing
     NOTREACHED();
     return;
   }
   file_util::CloseFile(perf_log_file);
 }
 
 void LogPerfResult(const char* test_name, double value, const char* units) {
   if (!perf_log_file) {
     NOTREACHED();
     return;
   }
 
   fprintf(perf_log_file, "%s\t%g\t%s\n", test_name, value, units);
   printf("%s\t%g\t%s\n", test_name, value, units);
 }