MacViews: Remove redundant virtuals in NativeWidgetMac and co.

ui/views/cocoa/bridged_native_widget.h

Index: ui/views/cocoa/bridged_native_widget.h
diff --git a/ui/views/cocoa/bridged_native_widget.h b/ui/views/cocoa/bridged_native_widget.h
index f2a5fc8de441cec0e7daca7f8ae8aec2dd377e40..ae3afa628249222ccdb0542e2385f9777f8ba815 100644
--- a/ui/views/cocoa/bridged_native_widget.h
+++ b/ui/views/cocoa/bridged_native_widget.h
@@ -52,7 +52,7 @@ class VIEWS_EXPORT BridgedNativeWidget : public ui::LayerDelegate,
 
   // Creates one side of the bridge. |parent| must not be NULL.
   explicit BridgedNativeWidget(NativeWidgetMac* parent);
-  virtual ~BridgedNativeWidget();
+  ~BridgedNativeWidget() override;
 
   // Initialize the bridge, "retains" ownership of |window|.
   void Init(base::scoped_nsobject<NSWindow> window,
@@ -144,7 +144,7 @@ class VIEWS_EXPORT BridgedNativeWidget : public ui::LayerDelegate,
   bool window_visible() { return window_visible_; }
 
   // Overridden from internal::InputMethodDelegate:
-  virtual void DispatchKeyEventPostIME(const ui::KeyEvent& key) override;
+  void DispatchKeyEventPostIME(const ui::KeyEvent& key) override;
 
  private:
   // Closes all child windows. BridgedNativeWidget children will be destroyed.