Fix coredump in Accessibility Manager SetProfile on shutdown.

chrome/browser/chromeos/accessibility/accessibility_manager.cc

Index: chrome/browser/chromeos/accessibility/accessibility_manager.cc
diff --git a/chrome/browser/chromeos/accessibility/accessibility_manager.cc b/chrome/browser/chromeos/accessibility/accessibility_manager.cc
index 7cd7e32fd41a257062067df41ff7634819f78fc6..9a64e8573e18fb542eefcbd950357a321152d579 100644
--- a/chrome/browser/chromeos/accessibility/accessibility_manager.cc
+++ b/chrome/browser/chromeos/accessibility/accessibility_manager.cc
@@ -742,6 +742,9 @@ bool AccessibilityManager::IsAutoclickEnabled() {
 }
 
 void AccessibilityManager::UpdateAutoclickFromPref() {
+  if (!profile_)
+    return;
+
   bool enabled =
       profile_->GetPrefs()->GetBoolean(prefs::kAccessibilityAutoclickEnabled);
 
@@ -768,6 +771,9 @@ int AccessibilityManager::GetAutoclickDelay() const {
 }
 
 void AccessibilityManager::UpdateAutoclickDelayFromPref() {
+  if (!profile_)
+    return;
+
   int autoclick_delay_ms =
       profile_->GetPrefs()->GetInteger(prefs::kAccessibilityAutoclickDelayMs);