[Cleanup] Remove StringPrintf from global namespace

net/test/python_utils_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 34 matching lines @@
 }
 
 TEST(PythonUtils, PythonRunTime) {
   CommandLine cmd_line(CommandLine::NO_PROGRAM);
   EXPECT_TRUE(GetPythonCommand(&cmd_line));
 
   // Run a python command to print a string and make sure the output is what
   // we want.
   cmd_line.AppendArg("-c");
   std::string input("PythonUtilsTest");
-  std::string python_cmd = StringPrintf("print '%s';", input.c_str());
+  std::string python_cmd = base::StringPrintf("print '%s';", input.c_str());
   cmd_line.AppendArg(python_cmd);
   std::string output;
   EXPECT_TRUE(base::GetAppOutput(cmd_line, &output));
   TrimWhitespace(output, TRIM_TRAILING, &output);
   EXPECT_EQ(input, output);
 }