ash: Clean up naming of paint-related identifiers

ash/common/frame/caption_buttons/frame_caption_button.cc

 // Copyright 2013 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/common/frame/caption_buttons/frame_caption_button.h"
 
 #include "ui/gfx/animation/slide_animation.h"
 #include "ui/gfx/animation/throb_animation.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_palette.h"
@@ skipping 109 matching lines @@
         use_light_images_ ? SK_ColorWHITE : SK_ColorBLACK, bg_alpha));
   }
 
   int icon_alpha = swap_images_animation_->CurrentValueBetween(0, 255);
   int crossfade_icon_alpha = 0;
   if (icon_alpha < static_cast<int>(kFadeOutRatio * 255))
     crossfade_icon_alpha = static_cast<int>(255 - icon_alpha / kFadeOutRatio);
 
   if (crossfade_icon_alpha > 0 && !crossfade_icon_image_.isNull()) {
     gfx::Canvas icon_canvas(icon_image_.size(), canvas->image_scale(), false);
-    cc::PaintFlags paint;
-    paint.setAlpha(icon_alpha);
-    icon_canvas.DrawImageInt(icon_image_, 0, 0, paint);
+    cc::PaintFlags flags;
+    flags.setAlpha(icon_alpha);
+    icon_canvas.DrawImageInt(icon_image_, 0, 0, flags);
 
-    paint.setAlpha(crossfade_icon_alpha);
-    paint.setBlendMode(SkBlendMode::kPlus);
-    icon_canvas.DrawImageInt(crossfade_icon_image_, 0, 0, paint);
+    flags.setAlpha(crossfade_icon_alpha);
+    flags.setBlendMode(SkBlendMode::kPlus);
+    icon_canvas.DrawImageInt(crossfade_icon_image_, 0, 0, flags);
 
     PaintCentered(canvas, gfx::ImageSkia(icon_canvas.ExtractImageRep()),
                   alpha_);
   } else {
     if (!swap_images_animation_->is_animating())
       icon_alpha = alpha_;
     PaintCentered(canvas, icon_image_, icon_alpha);
   }
 }
 
@@ skipping 28 matching lines @@
     double inactive_alpha = kInactiveIconAlpha;
     if (hover_animation().is_animating()) {
       inactive_alpha =
           hover_animation().CurrentValueBetween(inactive_alpha, 1.0f);
     } else if (state() == STATE_PRESSED || state() == STATE_HOVERED) {
       inactive_alpha = 1.0f;
     }
     alpha *= inactive_alpha;
   }
 
-  cc::PaintFlags paint;
-  paint.setAlpha(alpha);
+  cc::PaintFlags flags;
+  flags.setAlpha(alpha);
   canvas->DrawImageInt(to_center, (width() - to_center.width()) / 2,
-                       (height() - to_center.height()) / 2, paint);
+                       (height() - to_center.height()) / 2, flags);
 }
 
 }  // namespace ash