[cros] Add Ctrl+Alt+E shortcut to Welcome/EULA screen that cancels update and starts with enrollment

chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc
index bf48bf10d9f12136a5ff2c12259181ec09fd98d5..f2b52d3b433e02d7f2a5d2bac13e85237f92a34b 100644
--- a/chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/update_screen_handler.cc
@@ -113,6 +113,9 @@ void UpdateScreenHandler::RegisterMessages() {
       base::Bind(&UpdateScreenHandler::HandleUpdateCancel,
                  base::Unretained(this)));
 #endif
+  web_ui()->RegisterMessageCallback("skipUpdateEnrollAfterEula",
+      base::Bind(&UpdateScreenHandler::HandleSkipUpdateEnrollAfterEula,
+                 base::Unretained(this)));
 }
 
 #if !defined(OFFICIAL_BUILD)
@@ -122,4 +125,10 @@ void UpdateScreenHandler::HandleUpdateCancel(const base::ListValue* args) {
 }
 #endif
 
+void UpdateScreenHandler::HandleSkipUpdateEnrollAfterEula(
+    const base::ListValue* args) {
+  DCHECK(args && args->empty());
+  screen_->SkipUpdateEnrollAfterEula();
+}
+
 }  // namespace chromeos