gn: Add chromium_builder_asan target.

build/sanitizers/sanitizers.gyp

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       'target_name': 'sanitizer_options',
       'type': 'static_library',
       'toolsets': ['host', 'target'],
@@ skipping 48 matching lines @@
           ['_type=="executable"', {
             'xcode_settings': {
               'OTHER_LDFLAGS': [
                 '-Wl,-u,__sanitizer_options_link_helper',
               ],
             },
           }],
         ],
       },
     },
+    # GN version: //build/sanitizers:copy_llvm_symbolizer
     {
       # Copy llvm-symbolizer to the product dir so that LKGR bots can package it.
       'target_name': 'llvm-symbolizer',
       'type': 'none',
       'variables': {
 
        # Path is relative to this GYP file.
        'llvm_symbolizer_path':
            '../../third_party/llvm-build/Release+Asserts/bin/llvm-symbolizer<(EXECUTABLE_SUFFIX)',
       },
       'conditions': [
         ['clang==1', {
           'copies': [{
             'destination': '<(PRODUCT_DIR)',
             'files': [
               '<(llvm_symbolizer_path)',
             ],
           }],
         }],
       ],
     },
   ],
 }