Fix null dereference on MemoryCache.

third_party/WebKit/Source/core/css/CSSCrossfadeValue.h

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CSSCrossfadeValue_h
 #define CSSCrossfadeValue_h
 
+#include "core/CoreExport.h"
 #include "core/css/CSSImageGeneratorValue.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/fetch/ImageResource.h"
 #include "core/fetch/ImageResourceClient.h"
 #include "core/fetch/ResourcePtr.h"
 #include "platform/graphics/Image.h"
 
 namespace blink {
 
 class ImageResource;
 class CrossfadeSubimageObserverProxy;
 class LayoutObject;
 
-class CSSCrossfadeValue final : public CSSImageGeneratorValue {
+class CORE_EXPORT CSSCrossfadeValue final : public CSSImageGeneratorValue {
     friend class CrossfadeSubimageObserverProxy;
     WILL_BE_USING_PRE_FINALIZER(CSSCrossfadeValue, dispose);
 public:
     static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue)
     {
         return adoptRefWillBeNoop(new CSSCrossfadeValue(fromValue, toValue, percentageValue));
     }
 
     ~CSSCrossfadeValue();
 
@@ skipping 54 matching lines @@
     RefPtr<Image> m_generatedImage;
 
     CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCrossfadeValue, isCrossfadeValue());
 
 } // namespace blink
 
 #endif // CSSCrossfadeValue_h