CreateShortcutIcon on Linux now creates icons at all available resolutions, not

chrome/browser/ui/web_applications/web_app_ui.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/ui/web_applications/web_app_ui.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 28 matching lines @@
 #endif
 
 using content::BrowserThread;
 using content::NavigationController;
 using content::WebContents;
 
 namespace {
 
 #if defined(OS_MACOSX)
 const int kDesiredSizes[] = {16, 32, 128, 256, 512};
+#elif defined(OS_LINUX)
+// Linux supports icons of any size. FreeDesktop Icon Theme Specification states
+// that "Minimally you should install a 48x48 icon in the hicolor theme."
+const int kDesiredSizes[] = {16, 32, 48, 128, 256, 512};
 #else
 const int kDesiredSizes[] = {32};
 #endif
 
 #if defined(OS_WIN)
 // UpdateShortcutWorker holds all context data needed for update shortcut.
 // It schedules a pre-update check to find all shortcuts that needs to be
 // updated. If there are such shortcuts, it schedules icon download and
 // update them when icons are downloaded. It observes TAB_CLOSING notification
 // and cancels all the work when the underlying tab is closing.
@@ skipping 382 matching lines @@
   }
 
   // |info_list| may still be empty at this point, in which case LoadImage
   // will call the OnImageLoaded callback with an empty image and exit
   // immediately.
   extensions::ImageLoader::Get(profile)->LoadImagesAsync(&extension, info_list,
       base::Bind(&OnImageLoaded, shortcut_info, callback));
 }
 
 }  // namespace web_app