Move some Document timers to frame-specific task runners.

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 689ee02c0a7bb76f715799464e55dd211e201927..683080aa49ad6abfae17d043d8ac67997f902da3 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -47,6 +47,7 @@
 #include "core/dom/custom/V0CustomElement.h"
 #include "core/fetch/ClientHintsPreferences.h"
 #include "core/frame/DOMTimerCoordinator.h"
+#include "core/frame/FrameTimer.h"
 #include "core/frame/HostsUsingFeatures.h"
 #include "core/html/parser/ParserSynchronizationPolicy.h"
 #include "core/page/PageVisibilityState.h"
@@ -1576,8 +1577,8 @@ class CORE_EXPORT Document : public ContainerNode,
   HeapVector<Member<Element>> m_topLayerElements;
 
   int m_loadEventDelayCount;
-  Timer<Document> m_loadEventDelayTimer;
-  Timer<Document> m_pluginLoadingTimer;
+  FrameTimer<Document> m_loadEventDelayTimer;
+  FrameTimer<Document> m_pluginLoadingTimer;
 
   ViewportDescription m_viewportDescription;
   ViewportDescription m_legacyViewportDescription;