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

third_party/WebKit/Source/core/css/CSSImageGeneratorValue.cpp

Index: third_party/WebKit/Source/core/css/CSSImageGeneratorValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSImageGeneratorValue.cpp b/third_party/WebKit/Source/core/css/CSSImageGeneratorValue.cpp
index 6010344ed2b838ca667417c252893716e05458dc..9a0984337e7c2dd357ac0b286d1225b81008f0bb 100644
--- a/third_party/WebKit/Source/core/css/CSSImageGeneratorValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSImageGeneratorValue.cpp
@@ -114,15 +114,14 @@ void CSSImageGeneratorValue::PutImage(const IntSize& size,
 
 PassRefPtr<Image> CSSImageGeneratorValue::GetImage(
     const LayoutObject& layout_object,
-    const IntSize& size,
-    float zoom) {
+    const IntSize& size) {
   switch (GetClassType()) {
     case kCrossfadeClass:
       return ToCSSCrossfadeValue(this)->GetImage(layout_object, size);
     case kLinearGradientClass:
       return ToCSSLinearGradientValue(this)->GetImage(layout_object, size);
     case kPaintClass:
-      return ToCSSPaintValue(this)->GetImage(layout_object, size, zoom);
+      return ToCSSPaintValue(this)->GetImage(layout_object, size);
     case kRadialGradientClass:
       return ToCSSRadialGradientValue(this)->GetImage(layout_object, size);
     case kConicGradientClass: