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

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 33 matching lines @@
   CSSValue* ComputedCSSValue() const override;
 
   LayoutSize ImageSize(const LayoutObject&,
                        float multiplier,
                        const LayoutSize& default_object_size) const override;
   bool ImageHasRelativeSize() const override { return !fixed_size_; }
   bool UsesImageContainerSize() const override { return !fixed_size_; }
   void AddClient(LayoutObject*) override;
   void RemoveClient(LayoutObject*) override;
   PassRefPtr<Image> GetImage(const LayoutObject&,
-                             const IntSize&,
-                             float) const override;
+                             const IntSize&) const override;
   bool KnownToBeOpaque(const LayoutObject&) const override;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   StyleGeneratedImage(const CSSImageGeneratorValue&);
 
   // TODO(sashab): Replace this with <const CSSImageGeneratorValue> once
   // Member<> supports const types.
   Member<CSSImageGeneratorValue> image_generator_value_;
   const bool fixed_size_;
 };
 
 DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleGeneratedImage, IsGeneratedImage());
 
 }  // namespace blink
 #endif