Revert of Rename Heap to ThreadHeap

third_party/WebKit/Source/core/frame/EventHandlerRegistry.cpp

Index: third_party/WebKit/Source/core/frame/EventHandlerRegistry.cpp
diff --git a/third_party/WebKit/Source/core/frame/EventHandlerRegistry.cpp b/third_party/WebKit/Source/core/frame/EventHandlerRegistry.cpp
index e437f5095372b15304b65363639f943fb159be4c..5bf13bd26d69f9c1677d217ecbe2cb1c9d4f9acf 100644
--- a/third_party/WebKit/Source/core/frame/EventHandlerRegistry.cpp
+++ b/third_party/WebKit/Source/core/frame/EventHandlerRegistry.cpp
@@ -255,9 +255,9 @@
         for (const auto& eventTarget : *targets) {
             Node* node = eventTarget.key->toNode();
             LocalDOMWindow* window = eventTarget.key->toDOMWindow();
-            if (node && !ThreadHeap::isHeapObjectAlive(node)) {
+            if (node && !Heap::isHeapObjectAlive(node)) {
                 deadTargets.append(node);
-            } else if (window && !ThreadHeap::isHeapObjectAlive(window)) {
+            } else if (window && !Heap::isHeapObjectAlive(window)) {
                 deadTargets.append(window);
             }
         }