Re-introduce the partial magnifier

chrome/browser/ui/ash/ash_init.cc

Index: chrome/browser/ui/ash/ash_init.cc
diff --git a/chrome/browser/ui/ash/ash_init.cc b/chrome/browser/ui/ash/ash_init.cc
index 0f50c6b7c5d41c43b2d7811f07bd56638a01cbb0..ef9d18aac8da618a07326e2a671faee0005624d0 100644
--- a/chrome/browser/ui/ash/ash_init.cc
+++ b/chrome/browser/ui/ash/ash_init.cc
@@ -96,12 +96,14 @@ void OpenAsh() {
       chromeos::accessibility::IsHighContrastEnabled());
 
   DCHECK(chromeos::MagnificationManager::Get());
+  bool magnifier_enabled =
+      chromeos::MagnificationManager::Get()->IsMagnifierEnabled();
   ash::MagnifierType magnifier_type =
       chromeos::MagnificationManager::Get()->GetMagnifierType();
-  ash::Shell::GetInstance()->magnification_controller()->SetEnabled(
-      magnifier_type == ash::MAGNIFIER_FULL);
-  ash::Shell::GetInstance()->partial_magnification_controller()->SetEnabled(
-      magnifier_type == ash::MAGNIFIER_PARTIAL);
+  ash::Shell::GetInstance()->magnification_controller()->
+      SetEnabled(magnifier_enabled && magnifier_type == ash::MAGNIFIER_FULL);
+  ash::Shell::GetInstance()->partial_magnification_controller()->
+      SetEnabled(magnifier_enabled && magnifier_type == ash::MAGNIFIER_PARTIAL);
 
   if (!CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableZeroBrowsersOpenForTests)) {