[prof] Add slide offset in dumpcpp script

tools/dump-cpp.py

 #!/usr/bin/env python
 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script executes dumpcpp.js, collects all dumped C++ symbols,
 # and merges them back into v8 log.
 
 import os
 import platform
 import re
 import subprocess
 import sys
 
 def is_file_executable(fPath):
   return os.path.isfile(fPath) and os.access(fPath, os.X_OK)
 
 if __name__ == '__main__':
   JS_FILES = ['splaytree.js', 'codemap.js', 'csvparser.js', 'consarray.js',
               'profile.js', 'logreader.js', 'tickprocessor.js', 'SourceMap.js',
-              'dumpcpp.js']
+              'dumpcpp.js', 'dumpcpp-driver.js']
   tools_path = os.path.dirname(os.path.realpath(__file__))
   on_windows = platform.system() == 'Windows'
   JS_FILES = [os.path.join(tools_path, f) for f in JS_FILES]
 
   args = []
   log_file = 'v8.log'
   debug = False
   for arg in sys.argv[1:]:
     if arg == '--debug':
       debug = True
@@ skipping 33 matching lines @@
   if on_windows and out:
     out = re.sub('\r+\n', '\n', out)
 
   is_written = not bool(out)
   with open(log_file, 'w') as f:
     for line in lines:
       if not is_written and line.startswith('tick'):
         f.write(out)
         is_written = True
       f.write(line)