Factor abstract base class IDLCompiler, concrete class IDLComplierV8

Source/bindings/scripts/utilities.py

Index: Source/bindings/scripts/utilities.py
diff --git a/Source/bindings/scripts/utilities.py b/Source/bindings/scripts/utilities.py
index 10679d46d211f002fbbec25c64556ed8ae47e328..edb065f89daa19052be3b60c9988ee1785318e61 100644
--- a/Source/bindings/scripts/utilities.py
+++ b/Source/bindings/scripts/utilities.py
@@ -24,13 +24,13 @@ def get_file_contents(filename):
         return ''.join(f.readlines())
 
 
-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):