Drop Precise blink builders on chromium.webkit, add corresponding Trusty builders.

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
 
 
 def simple_bot(bot_id, analyze_mode=None):
   return {
     'bot_ids': [bot_id],
     'analyze_mode': analyze_mode,
   }
 
 
 TRYBOTS = freeze({
   'tryserver.blink': {
     'builders': {
       'linux_precise_blink_dbg': simple_bot({
         'mastername': 'chromium.webkit',
-        'buildername': 'WebKit Linux Precise (dbg)',
+        'buildername': 'WebKit Linux Trusty (dbg)',
       }),
       'linux_precise_blink_rel': simple_bot({
         'mastername': 'chromium.webkit',
-        'buildername': 'WebKit Linux Precise',
+        'buildername': 'WebKit Linux Trusty',
       }),
       'linux_precise_blink_compile_dbg': simple_bot({
         'mastername': 'chromium.webkit',
-        'buildername': 'WebKit Linux Precise (dbg)',
+        'buildername': 'WebKit Linux Trusty (dbg)',
       }, analyze_mode='compile'),
       'linux_precise_blink_compile_rel': simple_bot({
         'mastername': 'chromium.webkit',
-        'buildername': 'WebKit Linux Precise',
+        'buildername': 'WebKit Linux Trusty',
       }, analyze_mode='compile'),
       'linux_trusty_blink_rel': simple_bot({
         'mastername': 'chromium.webkit',
         'buildername': 'WebKit Linux Trusty',
       }),
       'mac10.9_blink_dbg': simple_bot({
         'mastername': 'chromium.webkit',
         'buildername': 'WebKit Mac10.11 (dbg)',
       }),
       'mac10.9_blink_rel': simple_bot({
@@ skipping 516 matching lines @@
       'win_chrome_official': simple_bot({
         'mastername': 'chromium.chrome',
         'buildername': 'Google Chrome Win',
       }),
     },
   },
   'tryserver.v8': {
     'builders': {
       'v8_linux_blink_rel': simple_bot({
         'mastername': 'chromium.webkit',
-        'buildername': 'WebKit Linux Precise',
+        'buildername': 'WebKit Linux Trusty',
       }),
       'v8_linux_chromium_gn_rel': simple_bot({
         'mastername': 'client.v8.fyi',
         'buildername': 'V8 Linux GN',
       }),
       'v8_android_chromium_gn_dbg': simple_bot({
         'mastername': 'client.v8.fyi',
         'buildername': 'V8 Android GN (dbg)',
       }),
     },
   },
 })