DevTools: update responsive design icon.

Source/devtools/scripts/optimize_png_images.py

 #!/usr/bin/env python
 # Copyright (c) 2014 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 61 matching lines @@
         sys.exit(1)
 
 check_installed("pngcrush", "pngcrush", None)
 check_installed("optipng", "optipng", None)
 check_installed("advdef", "advancecomp", None)
 check_installed("pngout", None, "Utility can be downloaded here: http://www.jonof.id.au/kenutils")
 
 
 def optimize_png(file_name):
     png_full_path = images_path + "/" + file_name + ".png"
-    optimize_command = "%s -o2 %s" % (optimize_script_path, png_full_path)
+    optimize_command = "bash %s -o2 %s" % (optimize_script_path, png_full_path)
     proc = subprocess.Popen(optimize_command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True, cwd=chromium_src_path)
     return proc
 
 if len(svg_file_names):
     print "%d unoptimized png files found." % len(svg_file_names)
 else:
     print "All png files are already optimized."
     sys.exit()
 
 processes = {}
 for file_name in svg_file_names:
     name = re.sub(".svg$", "", file_name)
     name2x = name + "_2x"
     processes[name] = optimize_png(name)
     processes[name2x] = optimize_png(name2x)
 
 for file_name, proc in processes.items():
     (optimize_out, _) = proc.communicate()
     print("Optimization of %s finished: %s" % (file_name, optimize_out))
 
 devtools_file_hashes.update_file_hashes(hashes_file_path, svg_file_paths)