Add a stack of queues of elements with reaction queues.

third_party/WebKit/Source/core/dom/custom/CustomElementReactionTestHelpers.h

Index: third_party/WebKit/Source/core/dom/custom/CustomElementReactionTestHelpers.h
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElementReactionQueueTest.cpp b/third_party/WebKit/Source/core/dom/custom/CustomElementReactionTestHelpers.h
similarity index 60%
copy from third_party/WebKit/Source/core/dom/custom/CustomElementReactionQueueTest.cpp
copy to third_party/WebKit/Source/core/dom/custom/CustomElementReactionTestHelpers.h
index 41ee46d2818b42d7c9ee9c2da08546fea616765a..3ab89c48b5e0c45cf43ffcd86a2e1b77cea7bd9e 100644
--- a/third_party/WebKit/Source/core/dom/custom/CustomElementReactionQueueTest.cpp
+++ b/third_party/WebKit/Source/core/dom/custom/CustomElementReactionTestHelpers.h
@@ -2,16 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "core/dom/custom/CustomElementReactionQueue.h"
-
 #include "core/dom/custom/CustomElementReaction.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "wtf/text/AtomicString.h"
+
+#include "core/dom/custom/CustomElementReactionQueue.h"
+#include "platform/heap/Handle.h"
+#include "wtf/Noncopyable.h"
 #include <initializer_list>
 #include <vector>
 
 namespace blink {
 
+class Element;
+
 class Command : public GarbageCollectedFinalized<Command> {
     WTF_MAKE_NONCOPYABLE(Command);
 public:
@@ -97,50 +99,4 @@ private:
     HeapVector<Member<Command>> m_commands;
 };
 
-TEST(CustomElementReactionQueueTest, invokeReactions_one)
-{
-    std::vector<char> log;
-    CustomElementReactionQueue* queue = new CustomElementReactionQueue();
-    queue->add(new TestReaction({new Log('a', log)}));
-    queue->invokeReactions(nullptr);
-    EXPECT_EQ(log, std::vector<char>({'a'}))
-        << "the reaction should have been invoked";
-}
-
-TEST(CustomElementReactionQueueTest, invokeReactions_many)
-{
-    std::vector<char> log;
-    CustomElementReactionQueue* queue = new CustomElementReactionQueue();
-    queue->add(new TestReaction({new Log('a', log)}));
-    queue->add(new TestReaction({new Log('b', log)}));
-    queue->add(new TestReaction({new Log('c', log)}));
-    queue->invokeReactions(nullptr);
-    EXPECT_EQ(log, std::vector<char>({'a', 'b', 'c'}))
-        << "the reaction should have been invoked";
-}
-
-TEST(CustomElementReactionQueueTest, invokeReactions_recursive)
-{
-    std::vector<char> log;
-    CustomElementReactionQueue* queue = new CustomElementReactionQueue();
-
-    CustomElementReaction* third = new TestReaction({
-        new Log('c', log),
-        new Recurse(queue)}); // "Empty" recursion
-
-    CustomElementReaction* second = new TestReaction({
-        new Log('b', log),
-        new Enqueue(queue, third)}); // Unwinds one level of recursion
-
-    CustomElementReaction* first = new TestReaction({
-        new Log('a', log),
-        new Enqueue(queue, second),
-        new Recurse(queue)}); // Non-empty recursion
-
-    queue->add(first);
-    queue->invokeReactions(nullptr);
-    EXPECT_EQ(log, std::vector<char>({'a', 'b', 'c'}))
-        << "the reactions should have been invoked";
-}
-
 } // namespace blink