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

third_party/WebKit/Source/core/layout/LayoutImageResourceStyleImage.h

 /*
  * Copyright (C) 1999 Lars Knoll <knoll@kde.org>
  * Copyright (C) 1999 Antti Koivisto <koivisto@kde.org>
  * Copyright (C) 2006 Allan Sandfeld Jensen <kde@carewolf.com>
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 28 matching lines @@
  public:
   ~LayoutImageResourceStyleImage() override;
 
   static LayoutImageResource* Create(StyleImage* style_image) {
     return new LayoutImageResourceStyleImage(style_image);
   }
   void Initialize(LayoutObject*) override;
   void Shutdown() override;
 
   bool HasImage() const override { return true; }
-  PassRefPtr<Image> GetImage(const IntSize&, float) const override;
+  PassRefPtr<Image> GetImage(const IntSize&) const override;
   bool ErrorOccurred() const override { return style_image_->ErrorOccurred(); }
 
   bool ImageHasRelativeSize() const override {
     return style_image_->ImageHasRelativeSize();
   }
   LayoutSize ImageSize(float multiplier) const override;
   WrappedImagePtr ImagePtr() const override { return style_image_->Data(); }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit LayoutImageResourceStyleImage(StyleImage*);
   Member<StyleImage> style_image_;
 };
 
 }  // namespace blink
 
 #endif  // LayoutImageStyleImage_h