Revert "Verify that constant vectors aren't invalidated during iteration."

third_party/WebKit/Source/core/css/RuleSet.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 314 matching lines @@
                                 const MediaQueryEvaluator& medium,
                                 AddRuleFlags add_rule_flags) {
   TRACE_EVENT0("blink", "RuleSet::addRulesFromSheet");
 
   DCHECK(sheet);
 
   const HeapVector<Member<StyleRuleImport>>& import_rules =
       sheet->ImportRules();
   for (unsigned i = 0; i < import_rules.size(); ++i) {
     StyleRuleImport* import_rule = import_rules[i].Get();
-    // TODO(sof): CHECK() added for crbug.com/699269 diagnosis, remove sooner.
-    CHECK_EQ(import_rules.data(), sheet->ImportRules().data());
     if (import_rule->GetStyleSheet() &&
         (!import_rule->MediaQueries() ||
          medium.Eval(*import_rule->MediaQueries(),
                      &features_.ViewportDependentMediaQueryResults(),
                      &features_.DeviceDependentMediaQueryResults())))
       AddRulesFromSheet(import_rule->GetStyleSheet(), medium, add_rule_flags);
   }
 
   AddChildRules(sheet->ChildRules(), medium, add_rule_flags);
 }
@@ skipping 86 matching lines @@
 }
 
 #ifndef NDEBUG
 void RuleSet::Show() const {
   for (const auto& rule : all_rules_)
     rule.Selector().Show();
 }
 #endif
 
 }  // namespace blink