Make platform/graphics to use USING_FAST_MALLOC.

third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.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 DisplayItemClient_h
 #define DisplayItemClient_h
 
 #include "platform/PlatformExport.h"
 #include "platform/heap/Heap.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class DisplayItemClientInternalVoid;
 using DisplayItemClient = const DisplayItemClientInternalVoid*;
 
 inline DisplayItemClient toDisplayItemClient(const void* object) { return static_cast<DisplayItemClient>(object); }
 
 // Used to pass DisplayItemClient and debugName() (called only when needed) from
 // core/layout module etc. to platform/paint module.
 // The instance must not out-live the object. Long-time reference to a client must
 // use DisplayItemClient.
-class PLATFORM_EXPORT DisplayItemClientWrapper {
+class PLATFORM_EXPORT DisplayItemClientWrapper final {
     DISALLOW_NEW(); // Allow allocated in stack or in another object only.
 public:
     template <typename T>
     DisplayItemClientWrapper(const T& object)
         : m_displayItemClient(object.displayItemClient())
         , m_object(reinterpret_cast<const GenericClass&>(object))
         , m_debugNameInvoker(&invokeDebugName<T>)
     { }
 
     DisplayItemClientWrapper(const DisplayItemClientWrapper& other)
@@ skipping 14 matching lines @@
 
     DisplayItemClient m_displayItemClient;
     const GenericClass& m_object;
     using DebugNameInvoker = String(*)(const GenericClass&);
     DebugNameInvoker m_debugNameInvoker;
 };
 
 }
 
 #endif // DisplayItemClient_h