Oilpan: safely finalize DOMTimers.

Source/core/frame/DOMTimer.h

Index: Source/core/frame/DOMTimer.h
diff --git a/Source/core/frame/DOMTimer.h b/Source/core/frame/DOMTimer.h
index ad25afed777f2acae9aa2050cccee20130f9c1c8..508a1841884529871b964b78685b9a1f6be0da7d 100644
--- a/Source/core/frame/DOMTimer.h
+++ b/Source/core/frame/DOMTimer.h
@@ -56,9 +56,14 @@ public:
     static double hiddenPageAlignmentInterval();
     static double visiblePageAlignmentInterval();
 
+    // Eager finalization is needed to promptly stop this Timer object.
+    // Otherwise timer events might fire at an object that's slated for destruction
+    // (when lazily swept), but some of its members (m_action) may already have
+    // been finalized & must not be accessed.
+    EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
 
-    void dispose();
+    void disposeTimer();
 
 private:
     friend class DOMTimerCoordinator; // For create().