Remove unnecessary uses of HTMLDocument

third_party/WebKit/Source/core/dom/custom/CustomElementReactionStackTest.cpp

 // Copyright 2016 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.
 
 #include "core/dom/custom/CustomElementReactionStack.h"
 
 #include "core/dom/custom/CustomElementReaction.h"
 #include "core/dom/custom/CustomElementReactionTestHelpers.h"
 #include "core/dom/custom/CustomElementTestHelpers.h"
-#include "core/html/HTMLDocument.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/text/AtomicString.h"
 #include <initializer_list>
 #include <vector>
 
 namespace blink {
 
 TEST(CustomElementReactionStackTest, one)
 {
     std::vector<char> log;
@@ skipping 128 matching lines @@
     stack->enqueueToCurrentQueue(element, new TestReaction({
         new EnqueueToStack(stack, element,
             new TestReaction({ new Log('a', log) }) )
     }));
     stack->popInvokingReactions();
 
     EXPECT_EQ(log, std::vector<char>({ 'a' })) << "enqueued reaction from another reaction should run in the same invoke";
 }
 
 } // namespace blink