Magnifier: Prevent useless operation in enabling/disabling magnifier.

chrome/browser/chromeos/accessibility/accessibility_util.cc

Index: chrome/browser/chromeos/accessibility/accessibility_util.cc
diff --git a/chrome/browser/chromeos/accessibility/accessibility_util.cc b/chrome/browser/chromeos/accessibility/accessibility_util.cc
index d595850d83305da30d86e2ccbe10c9e9994237ae..d6cd7bb628f1501fbd5b308d91e685d582e36b79 100644
--- a/chrome/browser/chromeos/accessibility/accessibility_util.cc
+++ b/chrome/browser/chromeos/accessibility/accessibility_util.cc
@@ -211,8 +211,8 @@ void EnableHighContrast(bool enabled) {
 }
 
 void SetMagnifier(ash::MagnifierType type) {
-  if (MagnificationManager::GetInstance())
-    MagnificationManager::GetInstance()->SetMagnifier(type);
+  if (MagnificationManager::Get())
+    MagnificationManager::Get()->SetMagnifier(type);
 }
 
 void EnableVirtualKeyboard(bool enabled) {
@@ -275,9 +275,9 @@ bool IsVirtualKeyboardEnabled() {
 }
 
 ash::MagnifierType GetMagnifierType() {
-  if (!MagnificationManager::GetInstance())
+  if (!MagnificationManager::Get())
     return ash::MAGNIFIER_OFF;
-  return MagnificationManager::GetInstance()->GetMagnifierType();
+  return MagnificationManager::Get()->GetMagnifierType();
 }
 
 ash::MagnifierType MagnifierTypeFromName(const char type_name[]) {