Move PathExists to base namespace.

chrome/browser/first_run/upgrade_util_win.cc

 // Copyright (c) 2012 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 "chrome/browser/first_run/upgrade_util.h"
 
 #include <windows.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 156 matching lines @@
 }
 
 bool RelaunchChromeWithModeSwitch(const CommandLine& command_line) {
   return RelaunchChromeHelper(command_line, true);
 }
 
 bool IsUpdatePendingRestart() {
   base::FilePath new_chrome_exe;
   if (!GetNewerChromeFile(&new_chrome_exe))
     return false;
-  return file_util::PathExists(new_chrome_exe);
+  return base::PathExists(new_chrome_exe);
 }
 
 bool SwapNewChromeExeIfPresent() {
   base::FilePath new_chrome_exe;
   if (!GetNewerChromeFile(&new_chrome_exe))
     return false;
-  if (!file_util::PathExists(new_chrome_exe))
+  if (!base::PathExists(new_chrome_exe))
     return false;
   base::FilePath cur_chrome_exe;
   if (!PathService::Get(base::FILE_EXE, &cur_chrome_exe))
     return false;
 
   // Open up the registry key containing current version and rename information.
   bool user_install =
       InstallUtil::IsPerUserInstall(cur_chrome_exe.value().c_str());
   HKEY reg_root = user_install ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE;
   BrowserDistribution *dist = BrowserDistribution::GetDistribution();
@@ skipping 55 matching lines @@
     return false;
   // At this point the chrome.exe has been swapped with the new one.
   if (!RelaunchChromeBrowser(command_line)) {
     // The re-launch fails. Feel free to panic now.
     NOTREACHED();
   }
   return true;
 }
 
 }  // namespace upgrade_util