Migrate Timer to TaskRunnerTimer in AXObjectCacheImpl

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
index 7215255a5f69aa4114ac41f476cffbeb4dea16e8..a79d0b6e5c83ab862d4e0dbaf2fc29089b15cf7a 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
@@ -31,6 +31,7 @@
 #include "core/HTMLNames.h"
 #include "core/InputTypeNames.h"
 #include "core/dom/Document.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ -93,9 +94,10 @@ AXObjectCache* AXObjectCacheImpl::create(Document& document) {
 AXObjectCacheImpl::AXObjectCacheImpl(Document& document)
     : m_document(document),
       m_modificationCount(0),
-      m_notificationPostTimer(this,
-                              &AXObjectCacheImpl::notificationPostTimerFired) {
-}
+      m_notificationPostTimer(
+          TaskRunnerHelper::get(TaskType::UnspecedTimer, &document),
+          this,
+          &AXObjectCacheImpl::notificationPostTimerFired) {}
 
 AXObjectCacheImpl::~AXObjectCacheImpl() {
   ASSERT(m_hasBeenDisposed);