Remove orphaned pages from Oilpan

third_party/WebKit/Source/platform/heap/PersistentNode.cpp

Index: third_party/WebKit/Source/platform/heap/PersistentNode.cpp
diff --git a/third_party/WebKit/Source/platform/heap/PersistentNode.cpp b/third_party/WebKit/Source/platform/heap/PersistentNode.cpp
index 3cb1821980c5530b49d00f6458b7c736b5d57df1..4c09dc74b3512bb05a78ed01a95d05a4deb3d5c8 100644
--- a/third_party/WebKit/Source/platform/heap/PersistentNode.cpp
+++ b/third_party/WebKit/Source/platform/heap/PersistentNode.cpp
@@ -165,10 +165,6 @@ void CrossThreadPersistentRegion::prepareForThreadStateTermination(
         continue;
       BasePage* page = pageFromObject(rawObject);
       ASSERT(page);
-      // The main thread will upon detach just mark its heap pages as orphaned,
-      // but not invalidate its CrossThreadPersistent<>s.
-      if (page->orphaned())
-        continue;
       if (page->arena()->getThreadState() == threadState) {
         persistent->clear();
         ASSERT(slots->m_slot[i].isUnused());