Ozone: Fix Linux Build.

chrome/browser/extensions/global_shortcut_listener_ozone.h

Index: chrome/browser/extensions/global_shortcut_listener_ozone.h
diff --git a/chrome/browser/extensions/global_shortcut_listener_ozone.h b/chrome/browser/extensions/global_shortcut_listener_ozone.h
index 37812f992aec9db9f46cdaaab3507df69309ab5a..e7b56be78f092b054f2cdad5961d7e53788a4596 100644
--- a/chrome/browser/extensions/global_shortcut_listener_ozone.h
+++ b/chrome/browser/extensions/global_shortcut_listener_ozone.h
@@ -15,16 +15,14 @@ namespace extensions {
 class GlobalShortcutListenerOzone : public GlobalShortcutListener {
  public:
   GlobalShortcutListenerOzone();
-  virtual ~GlobalShortcutListenerOzone();
+  ~GlobalShortcutListenerOzone() override;
 
  private:
   // GlobalShortcutListener implementation.
-  virtual void StartListening() override;
-  virtual void StopListening() override;
-  virtual bool RegisterAcceleratorImpl(
-      const ui::Accelerator& accelerator) override;
-  virtual void UnregisterAcceleratorImpl(
-      const ui::Accelerator& accelerator) override;
+  void StartListening() override;
+  void StopListening() override;
+  bool RegisterAcceleratorImpl(const ui::Accelerator& accelerator) override;
+  void UnregisterAcceleratorImpl(const ui::Accelerator& accelerator) override;
 
   // Whether this object is listening for global shortcuts.
   bool is_listening_;