Give ProfileChooserView signin button focus.

chrome/browser/ui/views/profiles/profile_chooser_view.cc

Index: chrome/browser/ui/views/profiles/profile_chooser_view.cc
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.cc b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
index d1945be97a86dc5fc214a8f77426e6823344af9e..4636f5838fb459c515ab791e262fee48e559edb5 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.cc
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
@@ -508,6 +508,13 @@ void ProfileChooserView::ShowBubble(
   profile_bubble_->set_close_on_deactivate(close_on_deactivate_for_testing_);
   profile_bubble_->SetAlignment(border_alignment);
   profile_bubble_->GetWidget()->Show();
+  // On first showing the bubble, focus the signin button. This needs to be
+  // done here, since the first call to ShowView() happens before the view's
+  // FocusManager has been created.
+  if (view_mode == profiles::BUBBLE_VIEW_MODE_PROFILE_CHOOSER &&
+      profile_bubble_->signin_current_profile_link_) {
+    profile_bubble_->signin_current_profile_link_->RequestFocus();

[msw, 2015/07/13 20:06:22]

Make ProfileChooserView override WidgetDelegate's GetInitiallyFocusedView()?

[wjmaclean, 2015/07/13 21:11:40]

Done.

+  }
   profile_bubble_->SetArrowPaintType(views::BubbleBorder::PAINT_NONE);
 }