Let clients pass the verbose level they want to cpplint.

presubmit_canned_checks.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.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 import os as _os
 _HERE = _os.path.dirname(_os.path.abspath(__file__))
 
 # Justifications for each filter:
@@ skipping 94 matching lines @@
   keyword = 'DO NOT ''SUBMIT'
   errors = _FindNewViolationsOfRule(lambda _, line : keyword not in line,
                                     input_api, file_filter)
   text = '\n'.join('Found %s in %s' % (keyword, loc) for loc in errors)
   if text:
     return [output_api.PresubmitError(text)]
   return []
 
 
 def CheckChangeLintsClean(input_api, output_api, source_file_filter=None,
-                          lint_filters=None):
+                          lint_filters=None, verbose_level=None):
   """Checks that all '.cc' and '.h' files pass cpplint.py."""
   _RE_IS_TEST = input_api.re.compile(r'.*tests?.(cc|h)$')
   result = []
 
   cpplint = input_api.cpplint
   # Access to a protected member _XX of a client class
   # pylint: disable=W0212
   cpplint._cpplint_state.ResetErrorCounts()
 
   lint_filters = lint_filters or DEFAULT_LINT_FILTERS
   cpplint._SetFilters(','.join(lint_filters))
 
   # We currently are more strict with normal code than unit tests; 4 and 5 are
   # the verbosity level that would normally be passed to cpplint.py through
   # --verbose=#. Hopefully, in the future, we can be more verbose.
   files = [f.AbsoluteLocalPath() for f in
            input_api.AffectedSourceFiles(source_file_filter)]
   for file_name in files:
     if _RE_IS_TEST.match(file_name):
       level = 5
     else:
       level = 4
 
-    cpplint.ProcessFile(file_name, level)
+    verbose_level = verbose_level or level
+    cpplint.ProcessFile(file_name, verbose_level)
 
   if cpplint._cpplint_state.error_count > 0:
     if input_api.is_committing:
       res_type = output_api.PresubmitError
     else:
       res_type = output_api.PresubmitPromptWarning
     result = [res_type('Changelist failed cpplint.py check.')]
 
   return result
 
@@ skipping 966 matching lines @@
   for f in affected_files:
     cmd = ['gn', 'format', '--dry-run', f.AbsoluteLocalPath()]
     rc = gn.main(cmd)
     if rc == 2:
       warnings.append(output_api.PresubmitPromptWarning(
           '%s requires formatting. Please run `gn format --in-place %s`.' % (
               f.AbsoluteLocalPath(), f.LocalPath())))
   # It's just a warning, so ignore other types of failures assuming they'll be
   # caught elsewhere.
   return warnings