Use underscores to separate words in filenames in webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/jsonchecker.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/jsonchecker.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/jsonchecker.py b/third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/jsonchecker.py
index 9b9d624a58349cded3affc5c3f20f486b64c5097..dc254766812e8203a9a9cce60f03564d4f26b6ca 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/jsonchecker.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/jsonchecker.py
@@ -31,15 +31,15 @@ class JSONChecker(object):
 
     categories = set(('json/syntax',))
 
-    def __init__(self, file_path, handle_style_error):
+    def __init__(self, _, handle_style_error):
         self._handle_style_error = handle_style_error
         self._handle_style_error.turn_off_line_filtering()
 
     def check(self, lines):
         try:
             json.loads('\n'.join(lines) + '\n')
-        except ValueError as e:
-            self._handle_style_error(self.line_number_from_json_exception(e), 'json/syntax', 5, str(e))
+        except ValueError as error:
+            self._handle_style_error(self.line_number_from_json_exception(error), 'json/syntax', 5, str(error))
 
     @staticmethod
     def line_number_from_json_exception(error):