Don't throw "line too long" presubmit error on python import statements or...

Don't throw "line too long" presubmit error on python import statements or when pylint "line too long" is disabled.

BUG=

Review URL: https://codereview.chromium.org/1234333002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@296035 0039d316-1c4b-4281-b951-d872f2087c98

presubmit_canned_checks.py

@@ -345,11 +345,14 @@ def CheckLongLines(input_api, output_api, maxlen, source_file_filter=None):
   OBJC_FILE_EXTS = ('h', 'm', 'mm')
   OBJC_EXCEPTIONS = ('#define', '#endif', '#if', '#import', '#include',
                      '#pragma')
+  PY_FILE_EXTS = ('py')
+  PY_EXCEPTIONS = ('import', 'from')
 
   LANGUAGE_EXCEPTIONS = [
     (CPP_FILE_EXTS, CPP_EXCEPTIONS),
     (JAVA_FILE_EXTS, JAVA_EXCEPTIONS),
     (OBJC_FILE_EXTS, OBJC_EXCEPTIONS),
+    (PY_FILE_EXTS, PY_EXCEPTIONS),
   ]
 
   def no_long_lines(file_extension, line):
@@ -381,6 +384,9 @@ def CheckLongLines(input_api, output_api, maxlen, source_file_filter=None):
     if '<include' in line and file_extension in ('css', 'html', 'js'):
       return True
 
+    if 'pylint: disable=line-too-long' in line and file_extension == 'py':
+      return True
+
     return input_api.re.match(
         r'.*[A-Za-z][A-Za-z_0-9]{%d,}.*' % long_symbol, line)