[content/test/gpu] Run pylint check of gpu tests in unittest instead of PRESUBMIT

content/test/gpu/gpu_tests/lint_unittest.py

Index: content/test/gpu/gpu_tests/lint_unittest.py
diff --git a/content/test/gpu/gpu_tests/lint_unittest.py b/content/test/gpu/gpu_tests/lint_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..efc45c4eedb5aec2189438901e7d7c8402f44e30
--- /dev/null
+++ b/content/test/gpu/gpu_tests/lint_unittest.py
@@ -0,0 +1,48 @@
+# Copyright 2016 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.
+
+import unittest
+import os
+
+from gpu_tests import path_util
+
+path_util.AddDirToPathIfNeeded(
+    path_util.GetChromiumSrcDir(), 'third_party', 'logilab')
+
+path_util.AddDirToPathIfNeeded(
+    path_util.GetChromiumSrcDir(), 'third_party', 'logilab', 'logilab')
+
+path_util.AddDirToPathIfNeeded(
+    path_util.GetChromiumSrcDir(), 'third_party', 'pylint')
+
+try:
+  from pylint import lint
+except ImportError:
+  lint = None
+
+
+_RC_FILE = os.path.join(path_util.GetGpuTestDir(), 'pylintrc')
+
+def LintCheckPassed(directory):
+  args = [directory, '--rcfile=%s' % _RC_FILE]
+  try:
+    assert lint, 'pylint module cannot be found'
+    lint.Run(args)
+    assert False, (
+        'This should not be reached as lint.Run always raise SystemExit')
+  except SystemExit as err:
+    if err.code == 0:
+      return True
+    return False
+
+
+class LintTest(unittest.TestCase):
+
+  def testPassingPylintCheckForGpuTestsDir(self):
+    self.assertTrue(LintCheckPassed(os.path.abspath(os.path.dirname(__file__))))
+
+  def testPassingPylintCheckForPageSetsDir(self):
+    self.assertTrue(LintCheckPassed(
+      os.path.join(os.path.abspath(os.path.dirname(__file__)), '..', 'page_sets'
+                  )))