Remove the dependency on json schema compiler.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 799c5346300e9ec6d6395ef8a60f70355af2d5fe..1f2067ddbfa81096f87d4d886788b05ed19617de 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -1117,28 +1117,9 @@ def _GetJSONParseError(input_api, filename, eat_comments=True):
   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.
@@ -1150,11 +1131,6 @@ def _CheckParseErrors(input_api, output_api):
   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()
@@ -1174,10 +1150,6 @@ def _CheckParseErrors(input_api, output_api):
 
     if MatchesFile(excluded_patterns, path):
       return False
-
-    if (action == _GetIDLParseError and
-        not MatchesFile(idl_included_patterns, path)):
-      return False
     return True
 
   results = []