Add 'ThinLTO Linux ToT' buildbot (src part).

tools/mb/mb_config.pyl

 # 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.
 
 {
   # This is a map of buildbot master names -> buildbot builder names ->
   # config names (where each config name is a key in the 'configs' dict,
   # below). MB uses this dict to look up which config to use for a given bot.
   'masters': {
     'chromeos.chrome': {
@@ skipping 239 matching lines @@
       'Linux ARM': 'swarming_gn_release_bot_arm',
       'Linux deterministic': 'gn_release_bot',
       'Linux remote_run Builder': 'swarming_gn_release_bot',
       'Linux remote_run Tester': 'swarming_gn_release_bot',
       'Linux V8 API Stability': 'gn_release_bot',
       'Mac deterministic': 'gn_release_bot_mac_strip',
       'Mojo ChromiumOS': 'swarming_chromeos_gn_ozone_release_trybot',
       'Mojo Windows': 'gn_release_bot_minimal_symbols_x86',
       'Site Isolation Linux': 'gn_release_trybot',
       'Site Isolation Win': 'gn_release_trybot_x86',
+      'ThinLTO Linux ToT': 'gn_thin_lto_clang_tot_release_bot',
       'UBSanVptr Linux': 'gn_ubsan_vptr_release_bot',
       'WebKit Linux - TraceWrappables': 'swarming_gn_release_bot_x64',
       'WebKit Linux - WPTServe': 'swarming_gn_release_bot',
       'WebKit Mac - WPTServe': 'swarming_gn_release_bot',
       'WebKit Win - WPTServe': 'swarming_gn_release_bot_minimal_symbols_x86',
       'Win 10 Fast Ring': 'gn_release_trybot_x64',
       'Windows deterministic': 'gn_release_bot_minimal_symbols_x86',
       'Windows Clang deterministic': 'gn_clang_release_bot_minimal_symbols_x86',
       'Win LKGR (DrM 64)': 'gn_release_drmemory_drfuzz',
       'Win LKGR (DrM)': 'gn_release_drmemory_drfuzz_x86',
@@ skipping 1263 matching lines @@
     ],
 
     'gn_shared_release_bot_minimal_symbols_x86': [
       'gn', 'shared_release_bot', 'minimal_symbols', 'x86',
     ],
 
     'gn_syzyasan_no_pch_release_x86': [
       'gn', 'syzyasan', 'no_pch', 'release', 'x86',
     ],
 
+    'gn_thin_lto_clang_tot_release_bot': [
+      'gn', 'thin_lto', 'clang_tot', 'release_bot',
+    ],
+
     'gn_tsan_disable_nacl_line_tables_debug_bot': [
       'gn', 'tsan', 'disable_nacl', 'line_tables', 'debug_bot',
     ],
 
     'gn_tsan_disable_nacl_line_tables_release_bot': [
       'gn', 'tsan', 'disable_nacl', 'line_tables', 'release_bot',
     ],
 
     'gn_ubsan_release_bot': [
       'gn', 'ubsan', 'release_bot',
@@ skipping 885 matching lines @@
       'gn_args': 'symbolized=true',
       'gyp_defines':
         'release_extra_cflags="-O1 -fno-inline-functions -fno-inline"',
     },
 
     'syzyasan': {
       'gn_args': 'is_syzyasan=true',
       'gyp_defines': 'syzyasan=1'
     },
 
+    'thin_lto': {
+      'gn_args': 'use_thin_lto=true',
+      'mixins': ['cfi'],
+    },
+
     'tsan': {
       'gn_args': 'is_tsan=true',
       'gyp_defines': 'tsan=1',
     },
 
     'ubsan': {
       'gn_args': 'is_ubsan=true',
       'gyp_defines': 'ubsan=1',
     },
 
@@ skipping 42 matching lines @@
     },
 
     'drfuzz': { 'gn_args': 'use_drfuzz=true' },
 
     'drmemory': {
       'gn_args': 'is_component_build=true enable_iterator_debugging=false',
       'gyp_defines': 'component=shared_library build_for_tool=drmemory',
     },
   },
 }