Add ability to store hidpi theme images in data pack

ui/gfx/image/image_skia_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 "ui/gfx/image/image_skia.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/layout.h"
 #include "ui/gfx/image/image_skia_rep.h"
@@ skipping 69 matching lines @@
   EXPECT_EQ(1U, image_skia.image_reps().size());
 
   const ImageSkiaRep& result_200p =
       image_skia.GetRepresentation(ui::SCALE_FACTOR_200P);
 
   EXPECT_EQ(100, result_200p.GetWidth());
   EXPECT_EQ(200, result_200p.GetHeight());
   EXPECT_EQ(100, result_200p.pixel_width());
   EXPECT_EQ(200, result_200p.pixel_height());
   EXPECT_EQ(ui::SCALE_FACTOR_100P, result_200p.scale_factor());
-  EXPECT_EQ(2U, image_skia.image_reps().size());
+  EXPECT_EQ(1U, image_skia.image_reps().size());
 
   // Get the representation again and make sure it doesn't
   // generate new image skia rep.
   image_skia.GetRepresentation(ui::SCALE_FACTOR_100P);
-  EXPECT_EQ(2U, image_skia.image_reps().size());
   image_skia.GetRepresentation(ui::SCALE_FACTOR_200P);
-  EXPECT_EQ(2U, image_skia.image_reps().size());
+  EXPECT_EQ(1U, image_skia.image_reps().size());
 }
 
 TEST(ImageSkiaTest, DynamicSource) {
   ImageSkia image_skia(new DynamicSource(Size(100, 200)), Size(100, 200));
   EXPECT_EQ(0U, image_skia.image_reps().size());
   const ImageSkiaRep& result_100p =
       image_skia.GetRepresentation(ui::SCALE_FACTOR_100P);
   EXPECT_EQ(100, result_100p.GetWidth());
   EXPECT_EQ(200, result_100p.GetHeight());
   EXPECT_EQ(ui::SCALE_FACTOR_100P, result_100p.scale_factor());
@@ skipping 60 matching lines @@
 #endif  // OS_MACOSX
 
 TEST(ImageSkiaTest, GetBitmap) {
   ImageSkia image_skia(new DynamicSource(Size(100, 200)), Size(100, 200));
   const SkBitmap* bitmap = image_skia.bitmap();
   EXPECT_NE(static_cast<SkBitmap*>(NULL), bitmap);
   EXPECT_FALSE(bitmap->isNull());
 }
 
 }  // namespace gfx