base: Fix the TODO in string_util.h

chrome/installer/util/self_reg_work_item.cc

Index: chrome/installer/util/self_reg_work_item.cc
diff --git a/chrome/installer/util/self_reg_work_item.cc b/chrome/installer/util/self_reg_work_item.cc
index 6b7c4f3c01bf1a5c7128c9c8d744987513da6247..0f7514bf1eebea62d22220fdeac87c6b16b58fd7 100644
--- a/chrome/installer/util/self_reg_work_item.cc
+++ b/chrome/installer/util/self_reg_work_item.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "chrome/installer/util/logging_installer.h"
 
 // Default registration export names.
@@ -53,7 +54,7 @@ bool SelfRegWorkItem::RegisterDll(bool do_register) {
       if (!success) {
         PLOG(ERROR) << "Failed to " << (do_register ? "register" : "unregister")
                     << " DLL at " << dll_path_.c_str() <<
-                    StringPrintf(" 0x%08X", hr);
+                    base::StringPrintf(" 0x%08X", hr);
       }
     } else {
       LOG(ERROR) << "COM registration export function not found";