Remove ImageSkia::empty and ImageSkia::extractSubset

ui/views/controls/button/image_button_unittest.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 "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/layout.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/test/views_test_base.h"
 
 namespace {
 
 gfx::ImageSkia CreateTestImage(int width, int height) {
   SkBitmap bitmap;
   bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
   bitmap.allocPixels();
   return gfx::ImageSkia(bitmap);
 }
 
 }  // namespace
 
 namespace views {
 
 typedef ViewsTestBase ImageButtonTest;
 
 TEST_F(ImageButtonTest, Basics) {
   ImageButton button(NULL);
 
   // Our image to paint starts empty.
-  EXPECT_TRUE(button.GetImageToPaint().empty());
+  EXPECT_TRUE(button.GetImageToPaint().isNull());
 
   // Without a theme, buttons are 16x14 by default.
   EXPECT_EQ("16x14", button.GetPreferredSize().ToString());
 
   // We can set a preferred size when we have no image.
   button.SetPreferredSize(gfx::Size(5, 15));
   EXPECT_EQ("5x15", button.GetPreferredSize().ToString());
 
   // Set a normal image.
   gfx::ImageSkia normal_image = CreateTestImage(10, 20);
   button.SetImage(CustomButton::BS_NORMAL, &normal_image);
 
   // Image uses normal image for painting.
-  EXPECT_FALSE(button.GetImageToPaint().empty());
+  EXPECT_FALSE(button.GetImageToPaint().isNull());
   EXPECT_EQ(10, button.GetImageToPaint().width());
   EXPECT_EQ(20, button.GetImageToPaint().height());
 
   // Preferred size is the normal button size.
   EXPECT_EQ("10x20", button.GetPreferredSize().ToString());
 
   // Set a pushed image.
   gfx::ImageSkia pushed_image = CreateTestImage(11, 21);
   button.SetImage(CustomButton::BS_PUSHED, &pushed_image);
 
   // By convention, preferred size doesn't change, even though pushed image
   // is bigger.
   EXPECT_EQ("10x20", button.GetPreferredSize().ToString());
 
   // We're still painting the normal image.
-  EXPECT_FALSE(button.GetImageToPaint().empty());
+  EXPECT_FALSE(button.GetImageToPaint().isNull());
   EXPECT_EQ(10, button.GetImageToPaint().width());
   EXPECT_EQ(20, button.GetImageToPaint().height());
 
   // Set an overlay image.
   gfx::ImageSkia overlay_image = CreateTestImage(12, 22);
   button.SetOverlayImage(&overlay_image);
   EXPECT_EQ(12, button.overlay_image_.width());
   EXPECT_EQ(22, button.overlay_image_.height());
 
   // By convention, preferred size doesn't change, even though pushed image
   // is bigger.
   EXPECT_EQ("10x20", button.GetPreferredSize().ToString());
 
   // We're still painting the normal image.
-  EXPECT_FALSE(button.GetImageToPaint().empty());
+  EXPECT_FALSE(button.GetImageToPaint().isNull());
   EXPECT_EQ(10, button.GetImageToPaint().width());
   EXPECT_EQ(20, button.GetImageToPaint().height());
 
   // Reset the overlay image.
   button.SetOverlayImage(NULL);
-  EXPECT_TRUE(button.overlay_image_.empty());
+  EXPECT_TRUE(button.overlay_image_.isNull());
 }
 
 }  // namespace views