ui: Clean up naming of paint-related identifiers

ui/views/controls/button/radio_button.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "ui/views/controls/button/checkbox.h"
@@ skipping 19 matching lines @@
 
   // Overridden from Button:
   void NotifyClick(const ui::Event& event) override;
 
   // Overridden from LabelButton:
   ui::NativeTheme::Part GetThemePart() const override;
 
   // Overridden from Checkbox:
   void SetChecked(bool checked) override;
   void PaintFocusRing(gfx::Canvas* canvas,
-                      const cc::PaintFlags& paint) override;
+                      const cc::PaintFlags& flags) override;
   const gfx::VectorIcon& GetVectorIcon() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RadioButton);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_