Initialize an uninitialized variable. Move inits to header.

chrome/browser/chromeos/login/lock/webui_screen_locker.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_WEBUI_SCREEN_LOCKER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_WEBUI_SCREEN_LOCKER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 132 matching lines @@
 
   ~WebUIScreenLocker() override;
 
   // Ensures that user pod is focused.
   void FocusUserPod();
 
   // Reset user pod and ensures that user pod is focused.
   void ResetAndFocusUserPod();
 
   // The screen locker window.
-  views::Widget* lock_window_;
+  views::Widget* lock_window_ = nullptr;
 
   // Sign-in Screen controller instance (owns login screens).
   std::unique_ptr<SignInScreenController> signin_screen_controller_;
 
   // Login UI implementation instance.
   std::unique_ptr<WebUILoginDisplay> login_display_;
 
   // Tracks when the lock window is displayed and ready.
-  bool lock_ready_;
+  bool lock_ready_ = false;
 
   // Tracks when the WebUI finishes loading.
-  bool webui_ready_;
+  bool webui_ready_ = false;
 
   // Time when lock was initiated, required for metrics.
   base::TimeTicks lock_time_;
 
   std::unique_ptr<login::NetworkStateHelper> network_state_helper_;
 
-  // True is subscribed as keyboard controller observer.
-  bool is_observing_keyboard_;
+  // True iff this object is observing a keyboard controller.
+  bool is_observing_keyboard_ = false;
 
   base::WeakPtrFactory<WebUIScreenLocker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUIScreenLocker);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_WEBUI_SCREEN_LOCKER_H_