ui: Clean up naming of paint-related identifiers

ui/views/controls/button/checkbox.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 "ui/views/controls/button/checkbox.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 124 matching lines @@
     }
   }
 }
 
 void Checkbox::OnPaint(gfx::Canvas* canvas) {
   LabelButton::OnPaint(canvas);
 
   if (!UseMd() || !HasFocus())
     return;
 
-  cc::PaintFlags focus_paint;
-  focus_paint.setAntiAlias(true);
-  focus_paint.setColor(
+  cc::PaintFlags focus_flags;
+  focus_flags.setAntiAlias(true);
+  focus_flags.setColor(
       SkColorSetA(GetNativeTheme()->GetSystemColor(
                       ui::NativeTheme::kColorId_FocusedBorderColor),
                   0x66));
-  focus_paint.setStyle(cc::PaintFlags::kStroke_Style);
-  focus_paint.setStrokeWidth(2);
-  PaintFocusRing(canvas, focus_paint);
+  focus_flags.setStyle(cc::PaintFlags::kStroke_Style);
+  focus_flags.setStrokeWidth(2);
+  PaintFocusRing(canvas, focus_flags);
 }
 
 void Checkbox::OnFocus() {
   LabelButton::OnFocus();
   if (!UseMd())
     UpdateImage();
 }
 
 void Checkbox::OnBlur() {
   LabelButton::OnBlur();
@@ skipping 44 matching lines @@
                               bool focused,
                               ButtonState for_state,
                               const gfx::ImageSkia& image) {
   const size_t checked_index = checked ? 1 : 0;
   const size_t focused_index = focused ? 1 : 0;
   images_[checked_index][focused_index][for_state] = image;
   UpdateImage();
 }
 
 void Checkbox::PaintFocusRing(gfx::Canvas* canvas,
-                              const cc::PaintFlags& paint) {
+                              const cc::PaintFlags& flags) {
   gfx::RectF focus_rect(image()->bounds());
-  canvas->DrawRoundRect(focus_rect, 2.f, paint);
+  canvas->DrawRoundRect(focus_rect, 2.f, flags);
 }
 
 const gfx::VectorIcon& Checkbox::GetVectorIcon() const {
   return checked() ? kCheckboxActiveIcon : kCheckboxNormalIcon;
 }
 
 void Checkbox::NotifyClick(const ui::Event& event) {
   SetChecked(!checked());
   LabelButton::NotifyClick(event);
 }
 
 ui::NativeTheme::Part Checkbox::GetThemePart() const {
   return ui::NativeTheme::kCheckbox;
 }
 
 void Checkbox::GetExtraParams(ui::NativeTheme::ExtraParams* params) const {
   LabelButton::GetExtraParams(params);
   params->button.checked = checked_;
 }
 
 }  // namespace views