Enable arbitrary scale factor

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 301 matching lines @@
   return g_supported_scales->back();
 }
 
 // static
 ImageSkia ImageSkia::CreateFrom1xBitmap(const SkBitmap& bitmap) {
   return ImageSkia(ImageSkiaRep(bitmap, 0.0f));
 }
 
 bool ImageSkia::IsDSFScalingInImageSkiaEnabled() {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-#if defined(OS_WIN)
   return !command_line->HasSwitch(
-      switches::kDisallowArbitraryScaleFactorInImageSkia);
-#else
-  return command_line->HasSwitch(
-      switches::kAllowArbitraryScaleFactorInImageSkia);
-#endif
+      switches::kDisableArbitraryScaleFactorInImageSkia);
 }
 
 scoped_ptr<ImageSkia> ImageSkia::DeepCopy() const {
   ImageSkia* copy = new ImageSkia;
   if (isNull())
     return scoped_ptr<ImageSkia>(copy);
 
   CHECK(CanRead());
 
   std::vector<gfx::ImageSkiaRep>& reps = storage_->image_reps();
@@ skipping 164 matching lines @@
 bool ImageSkia::CanModify() const {
   return !storage_.get() || storage_->CanModify();
 }
 
 void ImageSkia::DetachStorageFromThread() {
   if (storage_.get())
     storage_->DetachFromThread();
 }
 
 }  // namespace gfx