Remove logging added for debugging the lockscreen crashes.

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

Index: chrome/browser/chromeos/login/lock/webui_screen_locker.h
diff --git a/chrome/browser/chromeos/login/lock/webui_screen_locker.h b/chrome/browser/chromeos/login/lock/webui_screen_locker.h
index 94957633b05574b5dd6ce67c04e7032f37e231f4..8ab0377f692aaa6db058ec7a873be7590b821c67 100644
--- a/chrome/browser/chromeos/login/lock/webui_screen_locker.h
+++ b/chrome/browser/chromeos/login/lock/webui_screen_locker.h
@@ -114,14 +114,6 @@ class WebUIScreenLocker : public WebUILoginView,
 
   // content::WebContentsObserver:
   void RenderProcessGone(base::TerminationStatus status) override;
-  // TODO(jdufault): Remove PluginCrashed, PluginHungStatusChanged,
-  // WebContentsDestroyed overrides once crbug.com/452599 is resolved.
-  void PluginCrashed(const base::FilePath& plugin_path,
-                     base::ProcessId plugin_pid) override;
-  void PluginHungStatusChanged(int plugin_child_id,
-                               const base::FilePath& plugin_path,
-                               bool is_hung) override;
-  void WebContentsDestroyed() override;
 
   // ash::KeyboardStateObserver:
   void OnVirtualKeyboardStateChanged(bool activated) override;