CustomElements: taking CustomElementReactionStack out of frameHost

third_party/WebKit/Source/core/dom/custom/CustomElementReactionStack.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 "bindings/core/v8/Microtask.h"
 #include "core/dom/Element.h"
 #include "core/dom/custom/CEReactionsScope.h"
 #include "core/dom/custom/CustomElementReactionQueue.h"
 #include "core/frame/FrameHost.h"
 
 namespace blink {
 
+namespace {
+
+CustomElementReactionStack& customElementReactionStack()
+{
+    DEFINE_STATIC_LOCAL(CustomElementReactionStack, customElementReactionStack, (new CustomElementReactionStack));
+    return customElementReactionStack;
+}
+
+} // namespace
+
 // TODO(dominicc): Consider using linked heap structures, avoiding
 // finalizers, to make short-lived entries fast.
 
 CustomElementReactionStack::CustomElementReactionStack()
 {
 }
 
 DEFINE_TRACE(CustomElementReactionStack)
 {
     visitor->trace(m_map);
@@ skipping 71 matching lines @@
     enqueue(m_backupQueue, element, reaction);
 }
 
 void CustomElementReactionStack::invokeBackupQueue()
 {
     DCHECK(isMainThread());
     invokeReactions(*m_backupQueue);
     m_backupQueue->clear();
 }
 
+CustomElementReactionStack& CustomElementReactionStack::current()
+{
+    return customElementReactionStack();
+}
+
 } // namespace blink