Remove ImageLoadingTracker class

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 "base/logging.h"
 #include "base/threading/simple_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ skipping 154 matching lines @@
   // 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());
 }
 
 // Tests that image_reps returns all of the representations in the
 // image when there are multiple representations for a scale factor.
-// This currently is the case with ImageLoadingTracker::LoadImages.
+// This currently is the case with ImageLoader::LoadImages.
 TEST(ImageSkiaTest, ManyRepsPerScaleFactor) {
   const int kSmallIcon1x = 16;
   const int kSmallIcon2x = 32;
   const int kLargeIcon1x = 32;
 
   ImageSkia image(new NullSource(), gfx::Size(kSmallIcon1x, kSmallIcon1x));
   // Simulate a source which loads images on a delay. Upon
   // GetImageForScaleFactor, it immediately returns null and starts loading
   // image reps slowly.
   image.GetRepresentation(ui::SCALE_FACTOR_100P);
@@ skipping 187 matching lines @@
   EXPECT_FALSE(threadsafe_on_thread.can_modify());
   EXPECT_TRUE(image.CanRead());
   EXPECT_FALSE(image.CanModify());
 }
 #endif  // ENABLE_NON_THREAD_SAFE
 
 // Just in case we ever get lumped together with other compilation units.
 #undef ENABLE_NON_THREAD_SAFE
 
 }  // namespace gfx