Update webpages_playback documentation

tools/skp/webpages_playback.py

 #!/usr/bin/env python
 # 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.
 
 """Archives or replays webpages and creates SKPs in a Google Storage location.
 
 To archive webpages and store SKP files (archives should be rarely updated):
 
-cd ../buildbot/slave/skia_slave_scripts
-python webpages_playback.py --dest_gsbase=gs://rmistry --record \
+cd skia
+python tools/skp/webpages_playback.py --dest_gsbase=gs://rmistry --record \
 --page_sets=all --skia_tools=/home/default/trunk/out/Debug/ \
 --browser_executable=/tmp/chromium/out/Release/chrome
 
 
 To replay archived webpages and re-generate SKP files (should be run whenever
 SkPicture.PICTURE_VERSION changes):
 
-cd ../buildbot/slave/skia_slave_scripts
-python webpages_playback.py --dest_gsbase=gs://rmistry \
+cd skia
+python tools/skp/webpages_playback.py --dest_gsbase=gs://rmistry \
 --page_sets=all --skia_tools=/home/default/trunk/out/Debug/ \
 --browser_executable=/tmp/chromium/out/Release/chrome
 
 
 Specify the --page_sets flag (default value is 'all') to pick a list of which
 webpages should be archived and/or replayed. Eg:
 
---page_sets=page_sets/skia_yahooanswers_desktop.json,\
-page_sets/skia_wikipedia_galaxynexus.json
+--page_sets=tools/skp/page_sets/skia_yahooanswers_desktop.py,\
+tools/skp/page_sets/skia_googlecalendar_nexus10.py
 
 The --browser_executable flag should point to the browser binary you want to use
 to capture archives and/or capture SKP files. Majority of the time it should be
 a newly built chrome binary.
 
 The --upload_to_gs flag controls whether generated artifacts will be uploaded
 to Google Storage (default value is False if not specified).
 
 The --non-interactive flag controls whether the script will prompt the user
 (default value is False if not specified).
 
 The --skia_tools flag if specified will allow this script to run
 debugger, render_pictures, and render_pdfs on the captured
 SKP(s). The tools are run after all SKPs are succesfully captured to make sure
 they can be added to the buildbots with no breakages.
-To preview the captured SKP before proceeding to the next page_set specify both
---skia_tools and --view_debugger_output.
 """
 
 import glob
 import optparse
 import os
 import posixpath
 import shutil
 import subprocess
 import sys
 import tempfile
@@ skipping 396 matching lines @@
       default=None)
   option_parser.add_option(
       '', '--non-interactive', action='store_true',
       help='Runs the script without any prompts. If this flag is specified and '
            '--skia_tools is specified then the debugger is not run.',
       default=False)
   options, unused_args = option_parser.parse_args()
 
   playback = SkPicturePlayback(options)
   sys.exit(playback.Run())