[Cleanup] Remove StringPrintf from global namespace

ash/display/display_controller.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 "ash/display/display_controller.h"
 
 #include <algorithm>
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_manager.h"
@@ skipping 231 matching lines @@
     return false;
 
   const std::string position_str = GetStringFromPosition(layout.position);
   dict_value->SetString("position", position_str);
   dict_value->SetInteger("offset", layout.offset);
   return true;
 }
 
 std::string DisplayLayout::ToString() const {
   const std::string position_str = GetStringFromPosition(position);
-  return StringPrintf("%s, %d", position_str.c_str(), offset);
+  return base::StringPrintf("%s, %d", position_str.c_str(), offset);
 }
 
 // static
 void DisplayLayout::RegisterJSONConverter(
     base::JSONValueConverter<DisplayLayout>* converter) {
   converter->RegisterCustomField<Position>(
       "position", &DisplayLayout::position, &GetPositionFromString);
   converter->RegisterIntField("offset", &DisplayLayout::offset);
 }
 
@@ skipping 498 matching lines @@
   static int root_window_count = 0;
   const internal::DisplayInfo& display_info =
       GetDisplayManager()->GetDisplayInfo(display);
   const gfx::Rect& bounds_in_pixel = display_info.bounds_in_pixel();
   aura::RootWindow::CreateParams params(bounds_in_pixel);
   params.host = Shell::GetInstance()->root_window_host_factory()->
       CreateRootWindowHost(bounds_in_pixel);
   params.initial_insets = display_info.GetOverscanInsetsInPixel();
   params.initial_root_window_scale = display_info.ui_scale();
   aura::RootWindow* root_window = new aura::RootWindow(params);
-  root_window->SetName(StringPrintf("RootWindow-%d", root_window_count++));
+  root_window->SetName(
+      base::StringPrintf("RootWindow-%d", root_window_count++));
 
   // No need to remove RootWindowObserver because
   // the DisplayManager object outlives RootWindow objects.
   root_window->AddRootWindowObserver(GetDisplayManager());
   root_window->SetProperty(internal::kDisplayIdKey, display.id());
   root_window->Init();
   return root_window;
 }
 
 aura::RootWindow* DisplayController::AddRootWindowForDisplay(
@@ skipping 77 matching lines @@
 }
 
 void DisplayController::OnFadeOutForSwapDisplayFinished() {
 #if defined(OS_CHROMEOS)
   SetPrimaryDisplay(ScreenAsh::GetSecondaryDisplay());
   Shell::GetInstance()->output_configurator_animation()->StartFadeInAnimation();
 #endif
 }
 
 }  // namespace ash