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

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

Index: third_party/WebKit/Source/platform/heap/ThreadState.h
diff --git a/third_party/WebKit/Source/platform/heap/ThreadState.h b/third_party/WebKit/Source/platform/heap/ThreadState.h
index 9f080c12829af58539c9c704f8d6acad4abacd7c..576519cdc0cff84f90f21f525cd9f90204948694 100644
--- a/third_party/WebKit/Source/platform/heap/ThreadState.h
+++ b/third_party/WebKit/Source/platform/heap/ThreadState.h
@@ -57,7 +57,6 @@
 struct GCInfo;
 class GarbageCollectedMixinConstructorMarker;
 class HeapObjectHeader;
-class PersistentNode;
 class PersistentRegion;
 class BaseHeap;
 class SafePointAwareMutexLocker;
@@ -510,14 +509,6 @@
     size_t threadStackSize();
 #endif
 
-#if defined(LEAK_SANITIZER)
-    void registerStaticPersistentNode(PersistentNode*);
-    void releaseStaticPersistentNodes();
-
-    void enterStaticReferenceRegistrationDisabledScope();
-    void leaveStaticReferenceRegistrationDisabledScope();
-#endif
-
 private:
     enum SnapshotType {
         HeapSnapshot,
@@ -660,15 +651,6 @@
     void* m_asanFakeStack;
 #endif
 
-#if defined(LEAK_SANITIZER)
-    // PersistentNodes that are stored in static references;
-    // references we have to clear before initiating LSan's leak detection.
-    HashSet<PersistentNode*> m_staticPersistents;
-
-    // Count that controls scoped disabling of persistent registration.
-    size_t m_disabledStaticPersistentsRegistration;
-#endif
-
     // Ideally we want to allocate an array of size |gcInfoTableMax| but it will
     // waste memory. Thus we limit the array size to 2^8 and share one entry
     // with multiple types of vectors. This won't be an issue in practice,