Add ability to open/close ash desktop via hot dogs.

chrome/browser/ui/ash/ash_util.h

Index: chrome/browser/ui/ash/ash_util.h
diff --git a/chrome/browser/ui/ash/ash_util.h b/chrome/browser/ui/ash/ash_util.h
index 6e0cb9e3911ab07a92b1a106721843ae66d638ae..4de12aa77334e7a47d8fe26fb4560a59da75ff0a 100644
--- a/chrome/browser/ui/ash/ash_util.h
+++ b/chrome/browser/ui/ash/ash_util.h
@@ -14,6 +14,9 @@ namespace chrome {
 bool IsNativeViewInAsh(gfx::NativeView native_view);
 bool IsNativeWindowInAsh(gfx::NativeWindow native_window);
 
+// Opens the Ash desktop if it's closed; otherwise, closes it.
+void ToggleAshDesktop();
+
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_ASH_ASH_UTIL_H_