base: Fix the TODO in string_util.h

chrome/test/mini_installer_test/chrome_mini_installer.cc

Index: chrome/test/mini_installer_test/chrome_mini_installer.cc
diff --git a/chrome/test/mini_installer_test/chrome_mini_installer.cc b/chrome/test/mini_installer_test/chrome_mini_installer.cc
index 5e94dcdb9a204fc655a071eeb8565f7cd55de563..36acf0b449eafd58df52f42f39c401a0f1baf962 100644
--- a/chrome/test/mini_installer_test/chrome_mini_installer.cc
+++ b/chrome/test/mini_installer_test/chrome_mini_installer.cc
@@ -11,6 +11,7 @@
 #include "base/process_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/threading/platform_thread.h"
 #include "base/win/registry.h"
 #include "chrome/installer/util/browser_distribution.h"
@@ -29,7 +30,7 @@ ChromeMiniInstaller::ChromeMiniInstaller(const std::wstring& install_type,
       has_diff_installer_(false),
       has_full_installer_(false),
       has_prev_installer_(false) {
-  installer_name_ = StringPrintf(L"%ls (%ls)",
+  installer_name_ = base::StringPrintf(L"%ls (%ls)",
       mini_installer_constants::kChromeBuildType, install_type_.c_str());
 }