remove references to DEPRECATED SkBitmap::kA1_Config. No functional change expected.

ui/message_center/views/notification_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 "ui/message_center/views/notification_view.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_resources.h"
@@ skipping 94 matching lines @@
     factor = ui::GetScaleFactorForNativeView(widget->GetNativeView());
     if (factor == ui::SCALE_FACTOR_NONE)
       factor = ui::SCALE_FACTOR_100P;
   }
 
   // Extract that bitmap's alpha and look for a non-opaque pixel there.
   SkBitmap bitmap =
       image.GetRepresentation(ui::GetImageScale(factor)).sk_bitmap();
   if (!bitmap.isNull()) {
     SkBitmap alpha;
-    alpha.setConfig(SkBitmap::kA1_Config, bitmap.width(), bitmap.height(), 0);
     bitmap.extractAlpha(&alpha);
     for (int y = 0; y < bitmap.height(); ++y) {
       for (int x = 0; x < bitmap.width(); ++x) {
         if (alpha.getColor(x, y) != SK_ColorBLACK) {
           return true;
         }
       }
     }
   }
 
@@ skipping 669 matching lines @@
   return message_view_ ?
          message_view_->GetLinesForWidthAndLimit(width, limit) : 0;
 }
 
 int NotificationView::GetMessageHeight(int width, int limit) {
   return message_view_ ?
          message_view_->GetSizeForWidthAndLines(width, limit).height() : 0;
 }
 
 }  // namespace message_center