[Cleanup] Remove StringPrintf from global namespace

ui/app_list/pagination_model_unittest.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 "ui/app_list/pagination_model.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 39 matching lines @@
 
   const std::string& selected_pages() const { return selected_pages_; }
   int selection_count() const { return selection_count_; }
   int transition_start_count() const { return transition_start_count_; }
   int transition_end_count() const { return transition_end_count_; }
 
  private:
   void AppendSelectedPage(int page) {
     if (selected_pages_.length())
       selected_pages_.append(std::string(" "));
-    selected_pages_.append(StringPrintf("%d", page));
+    selected_pages_.append(base::StringPrintf("%d", page));
   }
 
   // PaginationModelObserver overrides:
   virtual void TotalPagesChanged() OVERRIDE {}
   virtual void SelectedPageChanged(int old_selected,
                                    int new_selected) OVERRIDE {
     AppendSelectedPage(new_selected);
     ++selection_count_;
     if (expected_page_selection_ &&
         selection_count_ == expected_page_selection_) {
@@ skipping 350 matching lines @@
   EXPECT_EQ(1, pagination_.selected_page());
 
   // But if the currently selected_page exceeds the total number of pages,
   // it automatically switches to the last page.
   pagination_.SetTotalPages(1);
   EXPECT_EQ(0, pagination_.selected_page());
 }
 
 }  // namespace test
 }  // namespace app_list