Expose array of bitmaps contained by gfx::Image similar to NSImage

ui/gfx/image/image_mac_unittest.mm

 // Copyright (c) 2011 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 <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_nsobject.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/image/image.h"
+#include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/image/image_unittest_util.h"
 
 namespace {
 
 class ImageMacTest : public testing::Test {
  public:
   void CreateBitmapImageRep(int width, int height, NSImageRep** image_rep) {
     scoped_nsobject<NSImage> image(
         [[NSImage alloc] initWithSize:NSMakeSize(width, height)]);
     [image lockFocus];
@@ skipping 19 matching lines @@
   NSImageRep* image_rep_2;
   CreateBitmapImageRep(width2, height2, &image_rep_2);
   scoped_nsobject<NSImage> ns_image(
       [[NSImage alloc] initWithSize:NSMakeSize(width1, height1)]);
   [ns_image addRepresentation:image_rep_1];
   [ns_image addRepresentation:image_rep_2];
 
   gfx::Image image(ns_image.release());
 
   EXPECT_EQ(1u, image.RepresentationCount());
-  EXPECT_EQ(2u, image.GetNumberOfSkBitmaps());
+  gfx::ImageSkia* image_skia = image.ToImageSkia();
+  EXPECT_EQ(2u, image_skia->GetNumberOfBitmaps());
 
-  const SkBitmap* bitmap1 = image.GetSkBitmapAtIndex(0);
+  const SkBitmap* bitmap1 = image_skia->GetBitmapAtIndex(0);
   EXPECT_TRUE(bitmap1);
-  const SkBitmap* bitmap2 = image.GetSkBitmapAtIndex(1);
+  const SkBitmap* bitmap2 = image_skia->GetBitmapAtIndex(1);
   EXPECT_TRUE(bitmap2);
 
   if (bitmap1->width() == width1) {
     EXPECT_EQ(bitmap1->height(), height1);
     EXPECT_EQ(bitmap2->width(), width2);
     EXPECT_EQ(bitmap2->height(), height2);
   } else {
     EXPECT_EQ(bitmap1->width(), width2);
     EXPECT_EQ(bitmap1->height(), height2);
     EXPECT_EQ(bitmap2->width(), width1);
     EXPECT_EQ(bitmap2->height(), height1);
   }
 
-  // GetNumberOfSkBitmaps and GetSkBitmapAtIndex should create a second
+  // GetNumberOfBitmaps and GetBitmapAtIndex should create a second
   // representation.
   EXPECT_EQ(2u, image.RepresentationCount());
 }
 
 TEST_F(ImageMacTest, MultiResolutionSkBitmapToNSImage) {
   const int width1 = 10;
   const int height1 = 12;
   const int width2 = 20;
   const int height2 = 24;
 
@@ skipping 21 matching lines @@
     EXPECT_EQ([image_rep_1 size].height, height2);
     EXPECT_EQ([image_rep_2 size].width, width1);
     EXPECT_EQ([image_rep_2 size].height, height1);
   }
 
   // Cast to NSImage* should create a second representation.
   EXPECT_EQ(2u, image.RepresentationCount());
 }
 
 } // namespace