Update Source/platform/ to assume Oilpan only.

third_party/WebKit/Source/platform/MemoryPurgeController.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MemoryPurgeController_h
 #define MemoryPurgeController_h
 
 #include "platform/PlatformExport.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
@@ skipping 18 matching lines @@
     // has occurred.
     virtual void purgeMemory(DeviceKind) = 0;
 
     DECLARE_VIRTUAL_TRACE();
 };
 
 // MemoryPurgeController listens to some events which could be opportunities
 // for reducing memory consumption and notifies its clients.
 // Since we want to control memory per tab, MemoryPurgeController is owned by
 // Page.
-class PLATFORM_EXPORT MemoryPurgeController final : public GarbageCollectedFinalized<MemoryPurgeController> {
+class PLATFORM_EXPORT MemoryPurgeController final : public GarbageCollected<MemoryPurgeController> {
     WTF_MAKE_NONCOPYABLE(MemoryPurgeController);
 public:
     static void onMemoryPressure(WebMemoryPressureLevel);
 
-    static RawPtr<MemoryPurgeController> create()
+    static MemoryPurgeController* create()
     {
         return new MemoryPurgeController;
     }
-    ~MemoryPurgeController();
 
     void registerClient(MemoryPurgeClient* client)
     {
         ASSERT(isMainThread());
         ASSERT(client);
         ASSERT(!m_clients.contains(client));
         m_clients.add(client);
     }
 
     void unregisterClient(MemoryPurgeClient* client)
@@ skipping 11 matching lines @@
 private:
     MemoryPurgeController();
 
     HeapHashSet<WeakMember<MemoryPurgeClient>> m_clients;
     DeviceKind m_deviceKind;
 };
 
 } // namespace blink
 
 #endif // MemoryPurgeController_h