Allow test files to use non-platform suffixes for PRESUBMIT checks.

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.
 """
 
 
 import re
 import subprocess
 import sys
 
 
 _EXCLUDED_PATHS = (
     r"^breakpad[\\\/].*",
     r"^native_client_sdk[\\\/]src[\\\/]build_tools[\\\/]make_rules.py",
     r"^native_client_sdk[\\\/]src[\\\/]build_tools[\\\/]make_simple.py",
     r"^native_client_sdk[\\\/]src[\\\/]tools[\\\/].*.mk",
     r"^net[\\\/]tools[\\\/]spdyshark[\\\/].*",
     r"^skia[\\\/].*",
     r"^v8[\\\/].*",
     r".*MakeFile$",
     r".+_autogen\.h$",
     r".+[\\\/]pnacl_shim\.c$",
 )
 
-# Fragment of a regular expression that matches file name suffixes
-# used to indicate different platforms.
-_PLATFORM_SPECIFIERS = r'(_(android|chromeos|gtk|mac|posix|win))?'
-
 # 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 = (
     r'.*[/\\](fake_|test_|mock_).+%s' % _IMPLEMENTATION_EXTENSIONS,
     r'.+_test_(base|support|util)%s' % _IMPLEMENTATION_EXTENSIONS,
-    r'.+_(api|browser|perf|unit|ui)?test%s%s' % (_PLATFORM_SPECIFIERS,
-                                                 _IMPLEMENTATION_EXTENSIONS),
+    r'.+_(api|browser|perf|unit|ui)?test(_[a-z]+)?%s' %
+        _IMPLEMENTATION_EXTENSIONS,
     r'.+profile_sync_service_harness%s' % _IMPLEMENTATION_EXTENSIONS,
     r'.*[/\\](test|tool(s)?)[/\\].*',
     # At request of folks maintaining this folder.
     r'chrome[/\\]browser[/\\]automation[/\\].*',
 )
 
 _TEST_ONLY_WARNING = (
     'You might be calling functions intended only for testing from\n'
     'production code.  It is OK to ignore this warning if you know what\n'
     'you are doing, as the heuristics used to detect the situation are\n'
@@ skipping 863 matching lines @@
       'win_rel',
       'win:compile',
   ]
 
   # Match things like path/aura/file.cc and path/file_aura.cc.
   # Same for chromeos.
   if any(re.search('[/_](aura|chromeos)', f) for f in files):
     trybots += ['linux_chromeos_clang:compile', 'linux_chromeos_asan']
 
   return trybots