Update {virtual,override,final} to follow C++11 style.

content/browser/android/popup_touch_handle_drawable.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 CONTENT_BROWSER_ANDROID_POPUP_TOUCH_HANDLE_DRAWABLE_H_
 #define CONTENT_BROWSER_ANDROID_POPUP_TOUCH_HANDLE_DRAWABLE_H_
 
 #include "ui/touch_selection/touch_handle.h"
 
 #include "base/android/jni_android.h"
 
 namespace content {
 
 // Touch handle drawable backed by an Android PopupWindow.
 class PopupTouchHandleDrawable : public ui::TouchHandleDrawable {
  public:
   PopupTouchHandleDrawable(base::android::ScopedJavaLocalRef<jobject> drawable,
                            float dpi_scale);
-  virtual ~PopupTouchHandleDrawable();
+  ~PopupTouchHandleDrawable() override;
 
   // ui::TouchHandleDrawable implementation.
-  virtual void SetEnabled(bool enabled) override;
-  virtual void SetOrientation(ui::TouchHandleOrientation orientation) override;
-  virtual void SetAlpha(float alpha) override;
-  virtual void SetFocus(const gfx::PointF& position) override;
-  virtual gfx::RectF GetVisibleBounds() const override;
+  void SetEnabled(bool enabled) override;
+  void SetOrientation(ui::TouchHandleOrientation orientation) override;
+  void SetAlpha(float alpha) override;
+  void SetFocus(const gfx::PointF& position) override;
+  gfx::RectF GetVisibleBounds() const override;
 
   static bool RegisterPopupTouchHandleDrawable(JNIEnv* env);
 
  private:
   const float dpi_scale_;
   base::android::ScopedJavaGlobalRef<jobject> drawable_;
 
   DISALLOW_COPY_AND_ASSIGN(PopupTouchHandleDrawable);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_POPUP_TOUCH_HANDLE_DRAWABLE_H_