Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

chrome/browser/google/google_update_settings_posix.cc

Index: chrome/browser/google/google_update_settings_posix.cc
diff --git a/chrome/browser/google/google_update_settings_posix.cc b/chrome/browser/google/google_update_settings_posix.cc
index c253421db784010aaf09dbd101ebf7cc16c986d6..4da917ab3b5172750f822099413a81102116151a 100644
--- a/chrome/browser/google/google_update_settings_posix.cc
+++ b/chrome/browser/google/google_update_settings_posix.cc
@@ -37,7 +37,7 @@ bool GoogleUpdateSettings::GetCollectStatsConsent() {
 bool GoogleUpdateSettings::SetCollectStatsConsent(bool consented) {
   base::FilePath consent_dir;
   PathService::Get(chrome::DIR_USER_DATA, &consent_dir);
-  if (!file_util::DirectoryExists(consent_dir))
+  if (!base::DirectoryExists(consent_dir))
     return false;
 
   base::FilePath consent_file = consent_dir.AppendASCII(kConsentToSendStats);
@@ -60,7 +60,7 @@ bool GoogleUpdateSettings::SetMetricsId(const std::wstring& client_id) {
   // Make sure that user has consented to send crashes.
   base::FilePath consent_dir;
   PathService::Get(chrome::DIR_USER_DATA, &consent_dir);
-  if (!file_util::DirectoryExists(consent_dir) ||
+  if (!base::DirectoryExists(consent_dir) ||
       !GoogleUpdateSettings::GetCollectStatsConsent())
     return false;