Patch to try dump-on-DCHECK.

build/config/BUILD.gn

 # 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.
 
 import("//build/config/allocator.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
@@ skipping 69 matching lines @@
       # Can be defined without ENABLE_BASIC_PRINTING.
       defines += [ "ENABLE_PRINT_PREVIEW=1" ]
     }
   }
   if (enable_spellcheck) {
     defines += [ "ENABLE_SPELLCHECK=1" ]
   }
   if (use_browser_spellchecker) {
     defines += [ "USE_BROWSER_SPELLCHECKER=1" ]
   }
+
+  # In Windows official builds, this will cause DCHECKs to
+  # dump-without-crashing. See crbug.com/596231.
+  if (is_official_build && is_win) {
+    dcheck_always_on = true
+    defines += [ "DCHECK_IS_DUMP_WITHOUT_CRASH=1" ]
+  }
+
   if (dcheck_always_on) {
     defines += [ "DCHECK_ALWAYS_ON=1" ]
   }
   if (use_udev) {
     # TODO(brettw) should probably be "=1".
     defines += [ "USE_UDEV" ]
   }
   if (ui_compositor_image_transport) {
     # TODO(brettw) should probably be "=1".
     defines += [ "UI_COMPOSITOR_IMAGE_TRANSPORT" ]
@@ skipping 360 matching lines @@
     # This error doesn't happen every time. In VS2013, it seems if the .pch
     # file doesn't exist, no error will be generated (probably MS tested this
     # case but forgot the other one?). To reproduce this error, do a build,
     # then delete the precompile.c.obj file, then build again.
     cflags_c = [ "/wd4206" ]
   } else if (is_mac && !is_official_build && !use_goma) {
     precompiled_header = "build/precompile.h"
     precompiled_source = "//build/precompile.h"
   }
 }