No need to kClear_Mode a layer right after its created, as that will automatically

chrome/browser/ui/views/download/download_item_view.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 "chrome/browser/ui/views/download/download_item_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 681 matching lines @@
   PaintImages(canvas,
               body_image_set->top_right, body_image_set->right,
               body_image_set->bottom_right,
               x, box_y_, box_height_, body_image_set->top_right->width());
 
   // Overlay our body hot state. Warning dialogs don't display body a hot state.
   if (!IsShowingWarningDialog() &&
       body_hover_animation_->GetCurrentValue() > 0) {
     canvas->SaveLayerAlpha(
         static_cast<int>(body_hover_animation_->GetCurrentValue() * 255));
-    canvas->sk_canvas()->drawARGB(0, 255, 255, 255, SkXfermode::kClear_Mode);
 
     int x = kLeftPadding;
     PaintImages(canvas,
                 hot_body_image_set_.top_left, hot_body_image_set_.left,
                 hot_body_image_set_.bottom_left,
                 x, box_y_, box_height_, hot_body_image_set_.top_left->width());
     x += body_image_set->top_left->width();
     PaintImages(canvas,
                 hot_body_image_set_.top, hot_body_image_set_.center,
                 hot_body_image_set_.bottom,
@@ skipping 13 matching lines @@
   if (drop_down_image_set) {
     PaintImages(canvas,
                 drop_down_image_set->top, drop_down_image_set->center,
                 drop_down_image_set->bottom,
                 x, box_y_, box_height_, drop_down_image_set->top->width());
 
     // Overlay our drop-down hot state.
     if (drop_hover_animation_->GetCurrentValue() > 0) {
       canvas->SaveLayerAlpha(
           static_cast<int>(drop_hover_animation_->GetCurrentValue() * 255));
-      canvas->sk_canvas()->drawARGB(0, 255, 255, 255, SkXfermode::kClear_Mode);
 
       PaintImages(canvas,
                   drop_down_image_set->top, drop_down_image_set->center,
                   drop_down_image_set->bottom,
                   x, box_y_, box_height_, drop_down_image_set->top->width());
 
       canvas->Restore();
     }
   }
 
@@ skipping 481 matching lines @@
 void DownloadItemView::AnimateStateTransition(State from, State to,
                                               ui::SlideAnimation* animation) {
   if (from == NORMAL && to == HOT) {
     animation->Show();
   } else if (from == HOT && to == NORMAL) {
     animation->Hide();
   } else if (from != to) {
     animation->Reset((to == HOT) ? 1.0 : 0.0);
   }
 }