cros: Cleanup lock screen and OOBE C++ backing code.

chrome/browser/chromeos/login/ui/webui_login_view.h

Index: chrome/browser/chromeos/login/ui/webui_login_view.h
diff --git a/chrome/browser/chromeos/login/ui/webui_login_view.h b/chrome/browser/chromeos/login/ui/webui_login_view.h
index 5963cf379b356591e5fe50c8b1464e45e7ea2197..deecab9f6d530e76a08a1f3f0037a0741b3a64b4 100644
--- a/chrome/browser/chromeos/login/ui/webui_login_view.h
+++ b/chrome/browser/chromeos/login/ui/webui_login_view.h
@@ -112,7 +112,7 @@ class WebUILoginView : public views::View,
                const content::NotificationDetails& details) override;
 
   // WebView for rendering a webpage as a webui login.
-  views::WebView* webui_login_;
+  views::WebView* webui_login_ = nullptr;
 
  private:
   // Map type for the accelerator-to-identifier map.
@@ -150,17 +150,17 @@ class WebUILoginView : public views::View,
   AccelMap accel_map_;
 
   // True when WebUI is being initialized hidden.
-  bool is_hidden_;
+  bool is_hidden_ = false;
 
   // True when the WebUI has finished initializing and is visible.
-  bool webui_visible_;
+  bool webui_visible_ = false;
 
   // Should we emit the login-prompt-visible signal when the login page is
   // displayed?
-  bool should_emit_login_prompt_visible_;
+  bool should_emit_login_prompt_visible_ = true;
 
   // True to forward keyboard event.
-  bool forward_keyboard_event_;
+  bool forward_keyboard_event_ = true;
 
   // A FocusTraversable for StatusAreaWidget that uses
   // |status_area_widget_host_| as placeholder in WebUiLoginView's focus chain.