[autofill] Hook the sign-in button up to required actions.

chrome/browser/ui/views/autofill/autofill_dialog_views.cc

Index: chrome/browser/ui/views/autofill/autofill_dialog_views.cc
diff --git a/chrome/browser/ui/views/autofill/autofill_dialog_views.cc b/chrome/browser/ui/views/autofill/autofill_dialog_views.cc
index 138698cc6c52dba7667a47973306073eff77e728..c01e5c29e7a3f742dab19be50170749a04f8849e 100644
--- a/chrome/browser/ui/views/autofill/autofill_dialog_views.cc
+++ b/chrome/browser/ui/views/autofill/autofill_dialog_views.cc
@@ -290,6 +290,7 @@ AutofillDialogViews::~AutofillDialogViews() {
 
 void AutofillDialogViews::Show() {
   InitChildViews();
+  UpdateAccountChooser();
   UpdateNotificationArea();
 
   // Ownership of |contents_| is handed off by this call. The
@@ -480,6 +481,7 @@ void AutofillDialogViews::OnDidChangeFocus(
 void AutofillDialogViews::LinkClicked(views::Link* source, int event_flags) {
   // Sign in link.
   if (source == sign_in_link_) {
+    DCHECK(sign_in_link_->enabled());  // TODO(dbeam): necessary?
     controller_->StartSignInFlow();
     return;
   }
@@ -568,12 +570,20 @@ views::View* AutofillDialogViews::CreateNotificationArea() {
   notification_label_->SetAutoColorReadabilityEnabled(false);
   notification_label_->SetMultiLine(true);
   notification_label_->set_collapse_when_hidden(true);
+  notification_label_->set_border(
+      views::Border::CreateEmptyBorder(10, 0, 10, 0));
 
   notification_area->AddChildView(notification_label_);
 
   return notification_area;
 }
 
+void AutofillDialogViews::UpdateAccountChooser() {
+  sign_in_link_->SetEnabled(controller_->HasReceivedWalletResponse());
+  sign_in_link_->SetVisible(!controller_->HasReceivedWalletResponse() ||
+                            !controller_->IsSignedIn());
+}
+
 void AutofillDialogViews::UpdateNotificationArea() {
   DCHECK(notification_label_);