base: Fix the TODO in string_util.h

chrome/browser/password_manager/password_store_x_unittest.cc

Index: chrome/browser/password_manager/password_store_x_unittest.cc
diff --git a/chrome/browser/password_manager/password_store_x_unittest.cc b/chrome/browser/password_manager/password_store_x_unittest.cc
index 4ab880b2075983dae6a4af6d0493ae256693fc75..bb09d4ebef443be733ebac208dfc818b243b0b4b 100644
--- a/chrome/browser/password_manager/password_store_x_unittest.cc
+++ b/chrome/browser/password_manager/password_store_x_unittest.cc
@@ -8,6 +8,7 @@
 #include "base/scoped_temp_dir.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
@@ -245,9 +246,11 @@ class LoginDatabaseQueryTask : public Task {
 void InitExpectedForms(bool autofillable, size_t count, VectorOfForms* forms) {
   const char* domain = autofillable ? "example" : "blacklisted";
   for (size_t i = 0; i < count; ++i) {
-    std::string realm = StringPrintf("http://%zu.%s.com", i, domain);
-    std::string origin = StringPrintf("http://%zu.%s.com/origin", i, domain);
-    std::string action = StringPrintf("http://%zu.%s.com/action", i, domain);
+    std::string realm = base::StringPrintf("http://%zu.%s.com", i, domain);
+    std::string origin = base::StringPrintf("http://%zu.%s.com/origin",
+                                            i, domain);
+    std::string action = base::StringPrintf("http://%zu.%s.com/action",
+                                            i, domain);
     PasswordFormData data = {
       PasswordForm::SCHEME_HTML,
       realm.c_str(),