Drop dependency on LayoutObject in fetch/

third_party/WebKit/Source/platform/graphics/Image.h

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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
@@ skipping 52 matching lines @@
     friend class GraphicsContext;
 
 public:
     virtual ~Image();
 
     static PassRefPtr<Image> loadPlatformResource(const char* name);
     static bool supportsType(const String&);
 
     virtual bool isSVGImage() const { return false; }
     virtual bool isBitmapImage() const { return false; }
-    virtual bool currentFrameKnownToBeOpaque() = 0;
+
+    // To increase accuracy of currentFrameKnownToBeOpaque() it may,
+    // for applicable image types, be told to pre-cache metadata for
+    // the current frame. Since this may initiate a deferred image
+    // decoding, PreCacheMetadata requires a InspectorPaintImageEvent
+    // during call.
+    enum MetadataMode { UseCurrentMetadata, PreCacheMetadata };
+    virtual bool currentFrameKnownToBeOpaque(MetadataMode = UseCurrentMetadata) = 0;
+
     virtual bool currentFrameIsComplete() { return false; }
     virtual bool currentFrameIsLazyDecoded() { return false; }
     virtual bool isTextureBacked();
 
     // Derived classes should override this if they can assure that the current
     // image frame contains only resources from its own security origin.
     virtual bool currentFrameHasSingleSecurityOrigin() const { return false; }
 
     static Image* nullImage();
     bool isNull() const { return size().isEmpty(); }
@@ skipping 74 matching lines @@
     RefPtr<SharedBuffer> m_encodedImageData;
     ImageObserver* m_imageObserver;
 };
 
 #define DEFINE_IMAGE_TYPE_CASTS(typeName) \
     DEFINE_TYPE_CASTS(typeName, Image, image, image->is##typeName(), image.is##typeName())
 
 } // namespace blink
 
 #endif