Move Singleton and related structs to namespace base

chrome/browser/chromeos/ui/accessibility_focus_ring_controller.cc

 // Copyright 2014 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/chromeos/ui/accessibility_focus_ring_controller.h"
 
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/shell.h"
 #include "base/logging.h"
 #include "chrome/browser/chromeos/ui/focus_ring_layer.h"
@@ skipping 21 matching lines @@
   }
   gfx::Rect bounds;
   std::vector<gfx::Rect> rects;
 };
 
 }  // namespace
 
 // static
 AccessibilityFocusRingController*
     AccessibilityFocusRingController::GetInstance() {
-  return Singleton<AccessibilityFocusRingController>::get();
+  return base::Singleton<AccessibilityFocusRingController>::get();
 }
 
 AccessibilityFocusRingController::AccessibilityFocusRingController()
     : compositor_(nullptr) {
 }
 
 AccessibilityFocusRingController::~AccessibilityFocusRingController() {
 }
 
 void AccessibilityFocusRingController::SetFocusRing(
@@ skipping 271 matching lines @@
 }
 
 void AccessibilityFocusRingController::OnCompositingShuttingDown(
     ui::Compositor* compositor) {
   DCHECK_EQ(compositor_, compositor);
   compositor_->RemoveAnimationObserver(this);
   compositor_ = nullptr;
 }
 
 }  // namespace chromeos