Warn on missing OVERRIDE/virtual everywhere, not just in header files.

ash/shelf/shelf_widget.cc

 // Copyright (c) 2012 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.
 
 #include "ash/shelf/shelf_widget.h"
 
 #include "ash/focus_cycler.h"
 #include "ash/launcher/launcher_delegate.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/launcher/launcher_navigator.h"
@@ skipping 53 matching lines @@
 
   // views::WidgetDelegate overrides:
   virtual views::Widget* GetWidget() OVERRIDE {
     return View::GetWidget();
   }
   virtual const views::Widget* GetWidget() const OVERRIDE {
     return View::GetWidget();
   }
 
   // ash::internal::BackgroundAnimatorDelegate overrides:
-  virtual void UpdateBackground(int alpha) {
+  virtual void UpdateBackground(int alpha) OVERRIDE {
     alpha_ = alpha;
     SchedulePaint();
   }
 
   // views::View overrides:
-  void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
 
   // A function to test the current alpha used.
   int get_dimming_alpha_for_test() { return alpha_; }
 
  private:
   // This class monitors mouse events to see if it is on top of the launcher.
   class DimmerEventFilter : public ui::EventHandler {
    public:
     explicit DimmerEventFilter(DimmerView* owner);
-    ~DimmerEventFilter();
+    virtual ~DimmerEventFilter();
 
     // Overridden from ui::EventHandler:
     virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
     virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
 
    private:
     // The owning class.
     DimmerView* owner_;
 
     // TRUE if the mouse is inside the shelf.
@@ skipping 471 matching lines @@
   return gfx::Rect();
 }
 
 void ShelfWidget::DisableDimmingAnimationsForTest() {
   DCHECK(delegate_view_);
   return delegate_view_->disable_dimming_animations_for_test();
 }
 
 }  // namespace ash