Add key based scrolling on magnified screen for kiosk mode.

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 f6a482ffec7d7a8f17370116093a0af2172cf2c6..d2320d0b94383695377b92aead472ee88ccabf27 100644
--- a/chrome/browser/ui/ash/ash_init.cc
+++ b/chrome/browser/ui/ash/ash_init.cc
@@ -25,6 +25,7 @@
 
 #if defined(OS_CHROMEOS)
 #include "base/sys_info.h"
+#include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/ui/ash/ime_controller_chromeos.h"
 #include "chrome/browser/ui/ash/volume_controller_chromeos.h"
 #include "chromeos/chromeos_switches.h"
@@ -65,7 +66,7 @@ void OpenAsh() {
 #if defined(OS_CHROMEOS)
   shell->accelerator_controller()->SetImeControlDelegate(
       scoped_ptr<ash::ImeControlDelegate>(new ImeController).Pass());
-  ash::Shell::GetInstance()->high_contrast_controller()->SetEnabled(
+  shell->high_contrast_controller()->SetEnabled(
       chromeos::AccessibilityManager::Get()->IsHighContrastEnabled());
 
   DCHECK(chromeos::MagnificationManager::Get());
@@ -73,9 +74,12 @@ void OpenAsh() {
       chromeos::MagnificationManager::Get()->IsMagnifierEnabled();
   ash::MagnifierType magnifier_type =
       chromeos::MagnificationManager::Get()->GetMagnifierType();
-  ash::Shell::GetInstance()->magnification_controller()->
+  shell->magnification_controller()->
       SetEnabled(magnifier_enabled && magnifier_type == ash::MAGNIFIER_FULL);
-  ash::Shell::GetInstance()->partial_magnification_controller()->
+  // Enable magnifier accelerators for modes that may not have mouse cursor.
+  shell->magnification_controller()->
+      SetMagnifierAcceleratorsEnabled(chrome::IsRunningInForcedAppMode());
+  shell->partial_magnification_controller()->
       SetEnabled(magnifier_enabled && magnifier_type == ash::MAGNIFIER_PARTIAL);
 
   if (!CommandLine::ForCurrentProcess()->HasSwitch(