Revert 282837 because it broke non-chromeos builds.

trunk/src/tools/resources/optimize-png-files.sh

 #!/bin/bash -i
 # Copyright 2013 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.
 
 # The optimization code is based on pngslim (http://goo.gl/a0XHg)
 # and executes a similar pipleline to optimize the png file size.
 # The steps that require pngoptimizercl/pngrewrite/deflopt are omitted,
 # but this runs all other processes, including:
 # 1) various color-dependent optimizations using optipng.
 # 2) optimize the number of huffman blocks.
 # 3) randomize the huffman table.
 # 4) Further optimize using optipng and advdef (zlib stream).
 # Due to the step 3), each run may produce slightly different results.
 #
 # Note(oshima): In my experiment, advdef didn't reduce much. I'm keeping it
 # for now as it does not take much time to run.
 
 readonly ALL_DIRS="
 ash/resources
 chrome/android/java/res
 chrome/app/theme
 chrome/browser/resources
 chrome/renderer/resources
 content/public/android/java/res
 content/renderer/resources
 content/shell/resources
 remoting/resources
 ui/resources
-ui/chromeos/resources
 ui/webui/resources/images
 webkit/glue/resources
 win8/metro_driver/resources
 "
 
 # Files larger than this file size (in bytes) will
 # use the optimization parameters tailored for large files.
 LARGE_FILE_THRESHOLD=3000
 
 # Constants used for optimization
@@ skipping 482 matching lines @@
 if [ $PROCESSED_FILE != 0 ]; then
   let diff=$TOTAL_OLD_BYTES-$TOTAL_NEW_BYTES
   let percent=$diff*100/$TOTAL_OLD_BYTES
   echo "Result: $TOTAL_OLD_BYTES => $TOTAL_NEW_BYTES bytes" \
        "($diff bytes: $percent%)"
 fi
 if [ $CORRUPTED_FILE != 0 ]; then
   echo "Warning: corrupted files found: $CORRUPTED_FILE"
   echo "Please contact the author of the CL that landed corrupted png files"
 fi