Getting rid of GetDefaultProfile & fixing multi user issues with accessibility

ash/accessibility_delegate.h

Index: ash/accessibility_delegate.h
diff --git a/ash/accessibility_delegate.h b/ash/accessibility_delegate.h
index 0d47c3837916b95cd367580b267b4caa0c16373c..a4ef7ebdcda9846491091c49ac4ec99e519158c3 100644
--- a/ash/accessibility_delegate.h
+++ b/ash/accessibility_delegate.h
@@ -63,9 +63,8 @@ class ASH_EXPORT AccessibilityDelegate {
   // Returns if autoclick is enabled or not.
   virtual bool IsAutoclickEnabled() const = 0;
 
-  // Returns true if the user wants to show accesibility menu even when all the
-  // accessibility features are disabled.
-  virtual bool ShouldAlwaysShowAccessibilityMenu() const = 0;
+  // Returns true when the accessibility menu should be shown.
+  virtual bool ShouldShowAccessibilityMenu() const = 0;
 
   // Cancel all current and queued speech immediately.
   virtual void SilenceSpokenFeedback() const = 0;