Work around for crbug.com/719609

src/objects/intl-objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTL_SUPPORT
 #error Internationalization is expected to be enabled.
 #endif  // V8_INTL_SUPPORT
 
 #include "src/objects/intl-objects.h"
 
@@ skipping 160 matching lines @@
   tz.getID(time_zone);
 
   icu::UnicodeString canonical_time_zone;
   icu::TimeZone::getCanonicalID(time_zone, canonical_time_zone, status);
   if (U_SUCCESS(status)) {
     // In CLDR (http://unicode.org/cldr/trac/ticket/9943), Etc/UTC is made
     // a separate timezone ID from Etc/GMT even though they're still the same
     // timezone. We'd not have "Etc/GMT" here because we canonicalize it and
     // other GMT-variants to "UTC" in intl.js and "UTC" is turned to "Etc/UTC"
     // by ICU before getting here.
-    DCHECK(canonical_time_zone != UNICODE_STRING_SIMPLE("Etc/GMT"));
-    if (canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/UTC")) {
+    // TODO(jshin): Figure out the cause of crbug.com/719609 and re-enable
+    //  DCHECK(canonical_time_zone != UNICODE_STRING_SIMPLE("Etc/GMT")) .
+    if (canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/UTC") ||
+        canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/GMT")) {
       JSObject::SetProperty(resolved,
                             factory->NewStringFromStaticChars("timeZone"),
                             factory->NewStringFromStaticChars("UTC"), SLOPPY)
           .Assert();
     } else {
       JSObject::SetProperty(resolved,
                             factory->NewStringFromStaticChars("timeZone"),
                             factory
                                 ->NewStringFromTwoByte(Vector<const uint16_t>(
                                     reinterpret_cast<const uint16_t*>(
@@ skipping 702 matching lines @@
 
 void V8BreakIterator::DeleteBreakIterator(
     const v8::WeakCallbackInfo<void>& data) {
   delete reinterpret_cast<icu::BreakIterator*>(data.GetInternalField(0));
   delete reinterpret_cast<icu::UnicodeString*>(data.GetInternalField(1));
   GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
 }
 
 }  // namespace internal
 }  // namespace v8