Clean up ProfileManager interface.

chrome/browser/metrics/extensions_metrics_provider.cc

Index: chrome/browser/metrics/extensions_metrics_provider.cc
diff --git a/chrome/browser/metrics/extensions_metrics_provider.cc b/chrome/browser/metrics/extensions_metrics_provider.cc
index 7af9b5a0824bc6bac22d9256a6fee90daa62537f..24cfedafcd001beb70682496e3c46b7ff89a9b8a 100644
--- a/chrome/browser/metrics/extensions_metrics_provider.cc
+++ b/chrome/browser/metrics/extensions_metrics_provider.cc
@@ -148,7 +148,7 @@ Profile* ExtensionsMetricsProvider::GetMetricsProfile() {
   // ProfileManager::GetLastUsedProfile(), except that that has the side effect
   // of creating a profile if it does not yet exist.
   cached_profile_ = profile_manager->GetProfileByPath(
-      profile_manager->GetLastUsedProfileDir(profile_manager->user_data_dir()));
+      profile_manager->GetLastUsedProfileDir());
   if (cached_profile_) {
     // Ensure that the returned profile is not an incognito profile.
     cached_profile_ = cached_profile_->GetOriginalProfile();