Re-introduce the partial magnifier

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index f93747d540e9d1638db63379cbb5839145c9eea1..88ae7e7fbbd9385dff15ddba76f3fc1c237172b5 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -354,6 +354,15 @@ void ChromeShellDelegate::ToggleHighContrast() {
 #endif
 }
 
+bool ChromeShellDelegate::IsMagnifierEnabled() const {
+#if defined(OS_CHROMEOS)
+  DCHECK(chromeos::MagnificationManager::Get());
+  return chromeos::MagnificationManager::Get()->IsMagnifierEnabled();
+#else
+  return false;
+#endif
+}
+
 ash::MagnifierType ChromeShellDelegate::GetMagnifierType() const {
 #if defined(OS_CHROMEOS)
   DCHECK(chromeos::MagnificationManager::Get());
@@ -363,10 +372,10 @@ ash::MagnifierType ChromeShellDelegate::GetMagnifierType() const {
 #endif
 }
 
-void ChromeShellDelegate::SetMagnifier(ash::MagnifierType type) {
+void ChromeShellDelegate::SetMagnifier(bool enabled, ash::MagnifierType type) {
 #if defined(OS_CHROMEOS)
   DCHECK(chromeos::MagnificationManager::Get());
-  return chromeos::MagnificationManager::Get()->SetMagnifier(type);
+  return chromeos::MagnificationManager::Get()->SetMagnifier(enabled, type);
 #endif
 }