Give ProfileChooserView signin button focus.

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

Index: chrome/browser/ui/views/profiles/profile_chooser_view.h
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.h b/chrome/browser/ui/views/profiles/profile_chooser_view.h
index b40e6af5af9d8e9edb06e87f084a1ea8e2c145b2..9e09891078888d8c9a580f467a938de11166da20 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.h
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.h
@@ -96,6 +96,9 @@ class ProfileChooserView : public content::WebContentsDelegate,
   // content::WebContentsDelegate:
   bool HandleContextMenu(const content::ContextMenuParams& params) override;
 
+  // views::WidgetDelegate:
+  views::View* GetInitiallyFocusedView() override;

[msw, 2015/07/13 21:37:30]

nit: merge this with the BubbleDelegateView overrides (or feel free to split
those by their constituent subclasses)

[wjmaclean, 2015/07/14 12:26:18]

Done.

+
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
@@ -220,6 +223,7 @@ class ProfileChooserView : public content::WebContentsDelegate,
 
   scoped_ptr<AvatarMenu> avatar_menu_;
   Browser* browser_;
+  views::View* initially_focused_view_;
 
   // Other profiles used in the "fast profile switcher" view.
   ButtonIndexes open_other_profile_indexes_map_;