Remove the dependency on json schema compiler.

PRESUBMIT.py

 # Copyright (c) 2012 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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
 
@@ skipping 1099 matching lines @@
           stdout=input_api.subprocess.PIPE,
           universal_newlines=True)
       (contents, _) = process.communicate(input=contents)
 
     input_api.json.loads(contents)
   except ValueError as e:
     return e
   return None
 
 
-def _GetIDLParseError(input_api, filename):
-  try:
-    contents = input_api.ReadFile(filename)
-    idl_schema = input_api.os_path.join(
-        input_api.PresubmitLocalPath(),
-        'tools', 'json_schema_compiler', 'idl_schema.py')
-    process = input_api.subprocess.Popen(
-        [input_api.python_executable, idl_schema],
-        stdin=input_api.subprocess.PIPE,
-        stdout=input_api.subprocess.PIPE,
-        stderr=input_api.subprocess.PIPE,
-        universal_newlines=True)
-    (_, error) = process.communicate(input=contents)
-    return error or None
-  except ValueError as e:
-    return e
-
-
 def _CheckParseErrors(input_api, output_api):
-  """Check that IDL and JSON files do not contain syntax errors."""
+  """Check that JSON files do not contain syntax errors."""
   actions = {
-    '.idl': _GetIDLParseError,
     '.json': _GetJSONParseError,
   }
   # These paths contain test data and other known invalid JSON files.
   excluded_patterns = [
     r'test[\\\/]data[\\\/]',
     r'^components[\\\/]policy[\\\/]resources[\\\/]policy_templates\.json$',
   ]
   # Most JSON files are preprocessed and support comments, but these do not.
   json_no_comments_patterns = [
     r'^testing[\\\/]',
   ]
-  # Only run IDL checker on files in these directories.
-  idl_included_patterns = [
-    r'^chrome[\\\/]common[\\\/]extensions[\\\/]api[\\\/]',
-    r'^extensions[\\\/]common[\\\/]api[\\\/]',
-  ]
 
   def get_action(affected_file):
     filename = affected_file.LocalPath()
     return actions.get(input_api.os_path.splitext(filename)[1])
 
   def MatchesFile(patterns, path):
     for pattern in patterns:
       if input_api.re.search(pattern, path):
         return True
     return False
 
   def FilterFile(affected_file):
     action = get_action(affected_file)
     if not action:
       return False
     path = affected_file.LocalPath()
 
     if MatchesFile(excluded_patterns, path):
       return False
-
-    if (action == _GetIDLParseError and
-        not MatchesFile(idl_included_patterns, path)):
-      return False
     return True
 
   results = []
   for affected_file in input_api.AffectedFiles(
       file_filter=FilterFile, include_deletes=False):
     action = get_action(affected_file)
     kwargs = {}
     if (action == _GetJSONParseError and
         MatchesFile(json_no_comments_patterns, affected_file.LocalPath())):
       kwargs['eat_comments'] = False
@@ skipping 535 matching lines @@
     builders.extend(['cros_x86'])
 
   # The AOSP bot doesn't build the chrome/ layer, so ignore any changes to it
   # unless they're .gyp(i) files as changes to those files can break the gyp
   # step on that bot.
   if (not all(re.search('^chrome', f) for f in files) or
       any(re.search('\.gypi?$', f) for f in files)):
     builders.extend(['android_aosp'])
 
   return GetDefaultTryConfigs(builders)