[Cleanup] Remove StringPrintf from global namespace

chrome/browser/chromeos/extensions/input_method_apitest_chromeos.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/extension_apitest.h"
 
 #include "base/command_line.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/chromeos/extensions/input_method_event_router.h"
 #include "chrome/browser/chromeos/input_method/input_method_configuration.h"
@@ skipping 28 matching lines @@
 
   virtual ~SetInputMethodListener() {
     EXPECT_EQ(0, count_);
   }
 
   // Implements the content::NotificationObserver interface.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE {
     const std::string& content = *content::Details<std::string>(details).ptr();
-    const std::string expected_message = StringPrintf("%s:%s",
-                                                      kSetInputMethodMessage,
-                                                      kNewInputMethod);
+    const std::string expected_message =
+        base::StringPrintf("%s:%s", kSetInputMethodMessage, kNewInputMethod);
     if (content == expected_message) {
       chromeos::input_method::GetInputMethodManager()->
-          ChangeInputMethod(StringPrintf("xkb:%s", kNewInputMethod));
+          ChangeInputMethod(base::StringPrintf("xkb:%s", kNewInputMethod));
 
       extensions::TestSendMessageFunction* function =
           content::Source<extensions::TestSendMessageFunction>(
               source).ptr();
       EXPECT_GT(count_--, 0);
       function->Reply(kSetInputMethodDone);
     }
   }
 
  private:
@@ skipping 11 matching lines @@
 };
 
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(ExtensionInputMethodApiTest, Basic) {
   // Two test, two calls. See JS code for more info.
   SetInputMethodListener listener(2);
 
   ASSERT_TRUE(RunExtensionTest("input_method")) << message_;
 }