Make linux_blink_oilpan_rel run layout tests only for changes touching third_party/WebKit

scripts/slave/recipe_modules/chromium_tests/trybots.py

 # Copyright 2015 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.
 
 from recipe_engine.types import freeze
 
 
 TRYBOTS = freeze({
   'tryserver.blink': {
     'builders': {
@@ skipping 225 matching lines @@
       'cast_shell_linux': {
         'mastername': 'chromium.linux',
         'buildername': 'Cast Linux',
       },
       'linux_arm': {
         'mastername': 'chromium.fyi',
         'buildername': 'Linux ARM',
       },
       'linux_blink_oilpan_rel': {
         'mastername': 'chromium.webkit',
-        'buildername': 'WebKit Linux Oilpan',
+        'buildername': 'WebKit Linux Oilpan Builder',
       },
       'linux_chromium_dbg_32_ng': {
         'mastername': 'chromium.linux',
         'buildername': 'Linux Builder (dbg)(32)',
         'tester': 'Linux Tests (dbg)(1)(32)',
       },
       'linux_chromium_dbg_ng': {
         'mastername': 'chromium.linux',
         'buildername': 'Linux Builder (dbg)',
         'tester': 'Linux Tests (dbg)(1)',
@@ skipping 268 matching lines @@
         'buildername': 'CrWinClang64',
       },
       # Optional GPU bots.
       'win_optional_gpu_tests_rel': {
         'mastername': 'chromium.win',
         'buildername': 'Win Builder',
       },
     },
   },
 })