Remove unnecessary zoom argument from GetImage() as its value is always available through the Layou…

third_party/WebKit/Source/core/style/StyleFetchedImageSet.h

 /*
  * Copyright (C) 2012 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
@@ skipping 51 matching lines @@
   bool IsLoaded() const override;
   bool ErrorOccurred() const override;
   LayoutSize ImageSize(const LayoutObject&,
                        float multiplier,
                        const LayoutSize& default_object_size) const override;
   bool ImageHasRelativeSize() const override;
   bool UsesImageContainerSize() const override;
   void AddClient(LayoutObject*) override;
   void RemoveClient(LayoutObject*) override;
   PassRefPtr<Image> GetImage(const LayoutObject&,
-                             const IntSize&,
-                             float) const override;
+                             const IntSize&) const override;
   float ImageScaleFactor() const override { return image_scale_factor_; }
   bool KnownToBeOpaque(const LayoutObject&) const override;
   ImageResourceContent* CachedImage() const override;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   StyleFetchedImageSet(ImageResourceContent*,
                        float image_scale_factor,
                        CSSImageSetValue*,
                        const KURL&);
 
   void Dispose();
 
   String DebugName() const override { return "StyleFetchedImageSet"; }
 
   Member<ImageResourceContent> best_fit_image_;
   float image_scale_factor_;
 
   Member<CSSImageSetValue> image_set_value_;  // Not retained; it owns us.
   const KURL url_;
 };
 
 DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleFetchedImageSet, IsImageResourceSet());
 
 }  // namespace blink
 
 #endif  // StyleFetchedImageSet_h