Fix up presubmit for SAN GCC->Clang fix.

PRESUBMIT.py

 # Copyright (c) 2013 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 Skia.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
@@ skipping 28 matching lines @@
 GOLD_TRYBOT_URL = 'https://gold.skia.org/search?issue='
 
 # Path to CQ bots feature is described in https://bug.skia.org/4364
 PATH_PREFIX_TO_EXTRA_TRYBOTS = {
     # pylint: disable=line-too-long
     'cmake/': 'master.client.skia.compile:Build-Mac-Clang-x86_64-Release-CMake-Trybot,Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot',
     # pylint: disable=line-too-long
     'src/opts/': 'master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot',
 
     'include/private/SkAtomics.h': ('master.client.skia:'
-      'Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-TSAN-Trybot,'
-      'Test-Ubuntu-GCC-Golo-GPU-GT610-x86_64-Release-TSAN-Trybot'
+      'Test-Ubuntu-Clang-GCE-CPU-AVX2-x86_64-Release-TSAN-Trybot,'
+      'Test-Ubuntu-Clang-Golo-GPU-GT610-x86_64-Release-TSAN-Trybot'
     ),
 
     # Below are examples to show what is possible with this feature.
     # 'src/svg/': 'master1:abc;master2:def',
     # 'src/svg/parser/': 'master3:ghi,jkl;master4:mno',
     # 'src/image/SkImage_Base.h': 'master5:pqr,stu;master1:abc1;master2:def',
 }
 
 
 def _CheckChangeHasEol(input_api, output_api, source_file_filter=None):
@@ skipping 542 matching lines @@
     state and an error if it is in 'Closed' state.
   """
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   results.extend(
       _CheckTreeStatus(input_api, output_api, json_url=(
           SKIA_TREE_STATUS_URL + '/banner-status?format=json')))
   results.extend(_CheckLGTMsForPublicAPI(input_api, output_api))
   results.extend(_CheckOwnerIsInAuthorsFile(input_api, output_api))
   return results