Remove ImageSkia::empty and ImageSkia::extractSubset

ui/views/controls/image_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/views/controls/image_view.h"
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/base/accessibility/accessible_view_state.h"
@@ skipping 92 matching lines @@
     case CENTER:   y = (height() - image_size.height()) / 2;             break;
     default:       NOTREACHED(); y = 0;                                  break;
   }
 
   return gfx::Point(x, y);
 }
 
 void ImageView::OnPaint(gfx::Canvas* canvas) {
   View::OnPaint(canvas);
 
-  if (image_.empty())
+  if (image_.isNull())
     return;
 
   gfx::Rect image_bounds(GetImageBounds());
   if (image_bounds.IsEmpty())
     return;
 
   if (image_bounds.size() != gfx::Size(image_.width(), image_.height())) {
     // Resize case
     SkPaint paint;
     paint.setFilterBitmap(true);
@@ skipping 42 matching lines @@
 
 bool ImageView::GetTooltipText(const gfx::Point& p, string16* tooltip) const {
   if (tooltip_text_.empty())
     return false;
 
   *tooltip = GetTooltipText();
   return true;
 }
 
 }  // namespace views