Fix the new First Run sentinel file path determination.

chrome/browser/first_run/first_run.cc

Index: chrome/browser/first_run/first_run.cc
diff --git a/chrome/browser/first_run/first_run.cc b/chrome/browser/first_run/first_run.cc
index ee7d583d66f39f3215a253656bbbd7baae6f6449..c57da39e46159038d2bc92ae04d4cf06edf70471 100644
--- a/chrome/browser/first_run/first_run.cc
+++ b/chrome/browser/first_run/first_run.cc
@@ -46,6 +46,7 @@
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
+#include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
@@ -572,6 +573,15 @@ bool CreateSentinel() {
   return base::WriteFile(first_run_sentinel, "", 0) != -1;
 }
 
+bool GetFirstRunSentinelFilePath(base::FilePath* path) {
+  base::FilePath first_run_sentinel;

[grt (UTC plus 2), 2014/03/25 17:37:06]

first_run_sentinel -> user_data_dir

[msw, 2014/03/25 23:33:13]

Done.

+  if (!PathService::Get(chrome::DIR_USER_DATA, &first_run_sentinel))
+    return false;
+
+  *path = first_run_sentinel.Append(chrome::kFirstRunSentinel);
+  return true;
+}
+
 // -- Platform-specific functions --
 
 #if !defined(OS_LINUX) && !defined(OS_BSD)