Remove builtin/runtime name clash presubmit check.

tools/check-name-clashes.py

-#!/usr/bin/env python
-# Copyright 2014 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.
-
-import js2c
-import os
-import re
-import sys
-
-FILENAME = "src/runtime/runtime.h"
-LISTHEAD = re.compile(r"#define\s+(FOR_EACH_\w+)\((\w+)\)")
-LISTBODY = re.compile(r".*\\$")
-
-
-class Function(object):
-  def __init__(self, match):
-    self.name = match.group(1).strip()
-
-def ListMacroRe(list):
-  macro = LISTHEAD.match(list[0]).group(2)
-  re_string = "\s*%s\((\w+)" % macro
-  return re.compile(re_string)
-
-
-def FindLists(filename):
-  lists = []
-  current_list = []
-  mode = "SEARCHING"
-  with open(filename, "r") as f:
-    for line in f:
-      if mode == "SEARCHING":
-        match = LISTHEAD.match(line)
-        if match:
-          mode = "APPENDING"
-          current_list.append(line)
-      else:
-        current_list.append(line)
-        match = LISTBODY.match(line)
-        if not match:
-          mode = "SEARCHING"
-          lists.append(current_list)
-          current_list = []
-  return lists
-
-
-# Detects runtime functions by parsing FILENAME.
-def FindRuntimeFunctions():
-  functions = []
-  lists = FindLists(FILENAME)
-  for list in lists:
-    function_re = ListMacroRe(list)
-    for line in list:
-      match = function_re.match(line)
-      if match:
-        functions.append(Function(match))
-  return functions
-
-
-class Builtin(object):
-  def __init__(self, match):
-    self.name = match.group(1)
-
-
-def FindJSNatives():
-  PATH = "src"
-  fileslist = []
-  for (root, dirs, files) in os.walk(PATH):
-    for f in files:
-      if f.endswith(".js"):
-        fileslist.append(os.path.join(root, f))
-  natives = []
-  regexp = re.compile("^function (\w+)\s*\((.*?)\) {")
-  matches = 0
-  for filename in fileslist:
-    with open(filename, "r") as f:
-      file_contents = f.read()
-    file_contents = js2c.ExpandInlineMacros(file_contents)
-    lines = file_contents.split("\n")
-    partial_line = ""
-    for line in lines:
-      if line.startswith("function") and not '{' in line:
-        partial_line += line.rstrip()
-        continue
-      if partial_line:
-        partial_line += " " + line.strip()
-        if '{' in line:
-          line = partial_line
-          partial_line = ""
-        else:
-          continue
-      match = regexp.match(line)
-      if match:
-        natives.append(Builtin(match))
-  return natives
-
-
-def Main():
-  functions = FindRuntimeFunctions()
-  natives = FindJSNatives()
-  errors = 0
-  runtime_map = {}
-  for f in functions:
-    runtime_map[f.name] = 1
-  for b in natives:
-    if b.name in runtime_map:
-      print("JS_Native/Runtime_Function name clash: %s" % b.name)
-      errors += 1
-
-  if errors > 0:
-    return 1
-  print("Runtime/Natives name clashes: checked %d/%d functions, all good." %
-        (len(functions), len(natives)))
-  return 0
-
-
-if __name__ == "__main__":
-  sys.exit(Main())