Use HiDPI app icons on CrOS when a theme is present

chrome/browser/themes/browser_theme_pack.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 "chrome/browser/themes/browser_theme_pack.h"
 
 #include <limits>
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 667 matching lines @@
 }
 
 // private:
 
 BrowserThemePack::BrowserThemePack()
     : header_(NULL),
       tints_(NULL),
       colors_(NULL),
       display_properties_(NULL),
       source_images_(NULL) {
-#if defined(OS_MACOSX)
   scale_factors_ = ui::GetSupportedScaleFactors();
-#else
-  scale_factors_.push_back(ui::SCALE_FACTOR_100P);
-#endif
 }
 
 void BrowserThemePack::BuildHeader(const Extension* extension) {
   header_ = new BrowserThemePackHeader;
   header_->version = kThemePackVersion;
 
   // TODO(erg): Need to make this endian safe on other computers. Prerequisite
   // is that ui::DataPack removes this same check.
 #if defined(__BYTE_ORDER)
   // Linux check
@@ skipping 525 matching lines @@
     ui::ScaleFactor scale_factor) const {
   if (prs_id < 0)
     return -1;
 
   for (size_t i = 0; i < scale_factors_.size(); ++i) {
     if (scale_factors_[i] == scale_factor)
       return static_cast<int>(kPersistingImagesLength * i) + prs_id;
   }
   return -1;
 }