[Cleanup] Remove StringPrintf from global namespace

chrome/browser/component_updater/component_unpacker.cc

Index: chrome/browser/component_updater/component_unpacker.cc
diff --git a/chrome/browser/component_updater/component_unpacker.cc b/chrome/browser/component_updater/component_unpacker.cc
index c9d44098ab602997812eb1ef8812404ce296ac76..9fa9a9ce2021493c6a5e9737ad3e3f1ad2d354ad 100644
--- a/chrome/browser/component_updater/component_unpacker.cc
+++ b/chrome/browser/component_updater/component_unpacker.cc
@@ -136,7 +136,8 @@ ComponentUnpacker::ComponentUnpacker(const std::vector<uint8>& pk_hash,
   }
   // We want the temporary directory to be unique and yet predictable, so
   // we can easily find the package in a end user machine.
-  std::string dir(StringPrintf("CRX_%s", base::HexEncode(hash, 6).c_str()));
+  std::string dir(
+      base::StringPrintf("CRX_%s", base::HexEncode(hash, 6).c_str()));
   unpack_path_ = path.DirName().AppendASCII(dir.c_str());
   if (file_util::DirectoryExists(unpack_path_)) {
     if (!file_util::Delete(unpack_path_, true)) {