Port flush_cache tool.

chrome/test/perf/perftests.cc

Index: chrome/test/perf/perftests.cc
===================================================================
--- chrome/test/perf/perftests.cc	(revision 6884)
+++ chrome/test/perf/perftests.cc	(working copy)
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/debug_util.h"
 #include "base/message_loop.h"
 #include "base/perftimer.h"
 #include "base/process_util.h"
@@ -11,7 +14,9 @@
 // TODO(darin): share code with base/run_all_perftests.cc
 
 int main(int argc, char **argv) {
+  base::AtExitManager exit_manager;
   base::EnableTerminationOnHeapCorruption();
+  CommandLine::SetArgcArgv(argc, argv);
   chrome::RegisterPathProvider();
   MessageLoop main_message_loop;
 
@@ -43,8 +48,8 @@
 
   // Raise to high priority to have more precise measurements. Since we don't
   // aim at 1% precision, it is not necessary to run at realtime level.
-    if (!IsDebuggerPresent()) {
-    SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
+  if (!DebugUtil::BeingDebugged()) {
+    base::RaiseProcessToHighPriority();
   }
 
   int result = RUN_ALL_TESTS();