Remove ImageLoadingTracker class

ui/gfx/image/image_skia.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 <algorithm>
 #include <cmath>
 #include <limits>
 
@@ skipping 238 matching lines @@
   return storage_.get() == other.storage_.get();
 }
 
 void ImageSkia::AddRepresentation(const ImageSkiaRep& image_rep) {
   DCHECK(!image_rep.is_null());
 
   // TODO(oshima): This method should be called |SetRepresentation|
   // and replace the existing rep if there is already one with the
   // same scale factor so that we can guarantee that a ImageSkia
   // instance contians only one image rep per scale factor. This is
-  // not possible now as ImageLoadingTracker currently stores need
+  // not possible now as ImageLoader currently stores need
   // this feature, but this needs to be fixed.
   if (isNull()) {
     Init(image_rep);
   } else {
     CHECK(CanModify());
     storage_->image_reps().push_back(image_rep);
   }
 }
 
 void ImageSkia::RemoveRepresentation(ui::ScaleFactor scale_factor) {
@@ skipping 134 matching lines @@
 bool ImageSkia::CanModify() const {
   return !storage_ || storage_->CanModify();
 }
 
 void ImageSkia::DetachStorageFromThread() {
   if (storage_)
     storage_->DetachFromThread();
 }
 
 }  // namespace gfx