Revert of Release Oilpan heap singletons prior to LSan leak detection.

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

Index: third_party/WebKit/Source/platform/heap/ThreadState.cpp
diff --git a/third_party/WebKit/Source/platform/heap/ThreadState.cpp b/third_party/WebKit/Source/platform/heap/ThreadState.cpp
index 1d476723a36e1c3bc1dea8a0f526dae1cccfa823..5dade81422fb90875c853471da1f73fa91d9e779 100644
--- a/third_party/WebKit/Source/platform/heap/ThreadState.cpp
+++ b/third_party/WebKit/Source/platform/heap/ThreadState.cpp
@@ -103,9 +103,6 @@
     , m_traceDOMWrappers(nullptr)
 #if defined(ADDRESS_SANITIZER)
     , m_asanFakeStack(__asan_get_current_fake_stack())
-#endif
-#if defined(LEAK_SANITIZER)
-    , m_disabledStaticPersistentsRegistration(0)
 #endif
 {
     ASSERT(checkThread());
@@ -1320,36 +1317,6 @@
     }
 }
 
-#if defined(LEAK_SANITIZER)
-void ThreadState::registerStaticPersistentNode(PersistentNode* node)
-{
-    if (m_disabledStaticPersistentsRegistration)
-        return;
-
-    ASSERT(!m_staticPersistents.contains(node));
-    m_staticPersistents.add(node);
-}
-
-void ThreadState::releaseStaticPersistentNodes()
-{
-    for (PersistentNode* node : m_staticPersistents)
-        persistentRegion()->freePersistentNode(node);
-
-    m_staticPersistents.clear();
-}
-
-void ThreadState::enterStaticReferenceRegistrationDisabledScope()
-{
-    m_disabledStaticPersistentsRegistration++;
-}
-
-void ThreadState::leaveStaticReferenceRegistrationDisabledScope()
-{
-    ASSERT(m_disabledStaticPersistentsRegistration);
-    m_disabledStaticPersistentsRegistration--;
-}
-#endif
-
 ThreadState::AttachedThreadStateSet& ThreadState::attachedThreads()
 {
     DEFINE_STATIC_LOCAL(AttachedThreadStateSet, threads, ());