Instrument setup.exe in the SyzyAsan builds.

chrome/tools/build/win/syzygy/BUILD.gn

 # 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/win/syzygy/syzygy.gni")
 
 # Where the output binaries will be placed.
@@ skipping 42 matching lines @@
         ]
         outputs = [
           "$syzygy_dest_dir/{{source_file_part}}",
         ]
         deps = [
           "//chrome:chrome_child",
         ]
       }
     }
   }
+
+  syzygy_asan("setup_syzygy") {
+    binary_name = "setup.exe"
+    dest_dir = syzygy_dest_dir
+
+    # Defer the crash reporter initialization as the crash reporter isn't
+    # available at startup in setup.exe.
+    extra_args = [ "--defer-crash-reporter-initialization" ]
+    deps = [
+      "//chrome/installer/setup",
+    ]
+  }
 } else {
   # No syzygy. Generate dummy targets so other targets can unconditionally
   # depend on these without having to duplicate our conditions.
   group("chrome_dll_syzygy") {
   }
   if (is_multi_dll_chrome) {
     group("chrome_child_dll_syzygy") {
     }
   }
 }
 
 # Prevent unused variable warning for code paths where this is unused.
 assert(syzygy_dest_dir != "")