Remove presubmit exception for the test runner library

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 10 matching lines @@
     r"^net[\\\/]tools[\\\/]spdyshark[\\\/].*",
     r"^skia[\\\/].*",
     r"^v8[\\\/].*",
     r".*MakeFile$",
     r".+_autogen\.h$",
     r".+[\\\/]pnacl_shim\.c$",
     r"^gpu[\\\/]config[\\\/].*_list_json\.cc$",
     r"^chrome[\\\/]browser[\\\/]resources[\\\/]pdf[\\\/]index.js"
 )
 
-# TestRunner and NetscapePlugIn library is temporarily excluded from pan-project
-# checks until it's transitioned to chromium coding style.
+# The NetscapePlugIn library is excluded from pan-project as it will soon
+# be deleted together with the rest of the NPAPI and it's not worthwhile to
+# update the coding style until then.
 _TESTRUNNER_PATHS = (
-    r"^content[\\\/]shell[\\\/]renderer[\\\/]test_runner[\\\/].*",
     r"^content[\\\/]shell[\\\/]tools[\\\/]plugin[\\\/].*",
 )
 
 # Fragment of a regular expression that matches C++ and Objective-C++
 # implementation files.
 _IMPLEMENTATION_EXTENSIONS = r'\.(cc|cpp|cxx|mm)$'
 
 # Regular expression that matches code only used for test binaries
 # (best effort).
 _TEST_CODE_EXCLUDED_PATHS = (
@@ skipping 1602 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)