Make SyzyAsan depend on 'syzyasan' GYP flag instead of 'asan==1 and OS=="win"'

chrome/chrome_syzygy.gyp

 # Copyright (c) 2011 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.
 {
   'conditions': [
-    ['OS=="win" and asan==1', {
+    ['syzyasan==1', {
       'variables': {
         'dest_dir': '<(PRODUCT_DIR)/syzygy',
         'syzygy_exe_dir': '<(DEPTH)/third_party/syzygy/binaries/exe',
       },
       # Copy the SyzyASan runtime and logger to the syzygy directory.
       'targets': [
         {
           'target_name': 'copy_syzyasan_binaries',
           'type': 'none',
           'outputs': [
@@ skipping 24 matching lines @@
           'type': 'none',
           'sources' : [],
           'includes': [
             'chrome_syzygy.gypi',
           ],
         },
       ],
     }],
     # Note, not else.
     ['OS=="win" and fastbuild==0 and chrome_multiple_dll==1 and '
-        '(asan!=1 or buildtype!="Official")', {
+        '(syzyasan!=1 or buildtype!="Official")', {
       'variables': {
         'dll_name': 'chrome_child',
       },
       'targets': [
         {
           'target_name': 'chrome_child_dll_syzygy',
           'type': 'none',
           'sources' : [],
           'includes': [
             'chrome_syzygy.gypi',
           ],
         },
       ],
     }, {
       'conditions': [
         ['OS=="win" and fastbuild==0 and chrome_multiple_dll==1 and '
-            'asan==1 and buildtype=="Official"', {
+            'syzyasan==1 and buildtype=="Official"', {
           'targets': [
           {
             'target_name': 'chrome_child_dll_syzygy',
             'type': 'none',
             'inputs': [
               '<(PRODUCT_DIR)/chrome_child.dll',
               '<(PRODUCT_DIR)/chrome_child.dll.pdb',
             ],
             'outputs': [
               '<(PRODUCT_DIR)/syzygy/chrome_child.dll',
               '<(PRODUCT_DIR)/syzygy/chrome_child.dll.pdb',
             ],
             'copies': [
               {
                 'destination': '<(PRODUCT_DIR)/syzygy',
                 'files': [
                   '<(PRODUCT_DIR)/chrome_child.dll',
                   '<(PRODUCT_DIR)/chrome_child.dll.pdb',
                 ],
               },
             ],
           }],
         }],
       ],
     }],
   ],
 }