Large Cursor: Add the toggle menuitem to a11y menu in uber tray

ash/shell_delegate.h

Index: ash/shell_delegate.h
diff --git a/ash/shell_delegate.h b/ash/shell_delegate.h
index 9aec503f6cfc88dbcf307926ac0cb7c2138d0f05..ead12aa1a4758c3d1c674b4a8b03e7180aacd25e 100644
--- a/ash/shell_delegate.h
+++ b/ash/shell_delegate.h
@@ -182,6 +182,12 @@ class ASH_EXPORT ShellDelegate {
   // Returns the current screen magnifier mode.
   virtual MagnifierType GetMagnifierType() const = 0;
 
+  // Invoked to enable the large cursor.

[Daniel Erat, 2013/06/06 16:22:35]

nit: s/the large cursor/large cursors/

(this is just a suggestion for these comments -- i think it's fine to leave the
rest of the code referring to "large cursor" rather than e.g. "large cursors")

[yoshiki, 2013/06/07 03:54:10]

Thanks for suggestion. "Large cursor" is the name of the feature and plural is
not good. I changed "large cursor" into "Large Cursor" to indicate it is a
feature name.

+  virtual void SetLargeCursorEnabled(bool enabled) = 0;
+
+  // Returns if the large cursor is enabled or not.

[Daniel Erat, 2013/06/06 16:22:35]

nit: s/the large cursor is/large cursors are/

[yoshiki, 2013/06/07 03:54:10]

Ditto.

+  virtual bool IsLargeCursorEnabled() const = 0;
+
   // Returns true if the user want to show accesibility menu even when all the
   // accessibility features are disabled.
   virtual bool ShouldAlwaysShowAccessibilityMenu() const = 0;