Factor abstract base class IDLCompiler, concrete class IDLComplierV8

Source/bindings/scripts/utilities.py

 # Copyright 2014 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.
 
 """Utility functions (file reading, simple IDL parsing by regexes) for IDL build."""
 
 import os
 import cPickle as pickle
 import re
 import string
 
 
 class IdlBadFilenameError(Exception):
     """Raised if an IDL filename disagrees with the interface name in the file."""
     pass
 
 
 ################################################################################
 # Basic file reading/writing
 ################################################################################
 
 def get_file_contents(filename):
     with open(filename) as f:
-        return ''.join(f.readlines())
+        return f.read()
 
 
-def write_file(new_lines, destination_filename, only_if_changed):
+def write_file(new_text, destination_filename, only_if_changed):
     if only_if_changed and os.path.isfile(destination_filename):
         with open(destination_filename) as destination_file:
-            if destination_file.readlines() == new_lines:
+            if destination_file.read() == new_text:
                 return
     with open(destination_filename, 'w') as destination_file:
-        destination_file.write(''.join(new_lines))
+        destination_file.write(new_text)
 
 
 def write_pickle_file(pickle_filename, data, only_if_changed):
     if only_if_changed and os.path.isfile(pickle_filename):
         with open(pickle_filename) as pickle_file:
             if pickle.load(pickle_file) == data:
                 return
     with open(pickle_filename, 'w') as pickle_file:
         pickle.dump(data, pickle_file)
 
@@ skipping 76 matching lines @@
 
 def get_put_forward_interfaces_from_idl(file_contents):
     put_forwards_pattern = (r'\[[^\]]*PutForwards=[^\]]*\]\s+'
                             r'readonly\s+'
                             r'attribute\s+'
                             r'(\w+)')
     return sorted(set(match.group(1)
                       for match in re.finditer(put_forwards_pattern,
                                                file_contents,
                                                flags=re.DOTALL)))