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

third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/csspaint/CSSPaintDefinition.h"
 
 #include "bindings/core/v8/V8BindingForCore.h"
 #include "core/css/CSSComputedStyleDeclaration.h"
 #include "core/css/cssom/FilteredComputedStylePropertyMap.h"
 #include "core/dom/ExecutionContext.h"
@@ skipping 51 matching lines @@
   native_invalidation_properties_.swap(native_invalidation_properties);
   custom_invalidation_properties_.swap(custom_invalidation_properties);
   input_argument_types_.swap(input_argument_types);
 }
 
 CSSPaintDefinition::~CSSPaintDefinition() {}
 
 PassRefPtr<Image> CSSPaintDefinition::Paint(
     const LayoutObject& layout_object,
     const IntSize& size,
-    float zoom,
     const CSSStyleValueVector* paint_arguments) {
   DCHECK(paint_arguments);
 
+  float zoom = layout_object.StyleRef().EffectiveZoom();
   const IntSize specified_size = GetSpecifiedSize(size, zoom);
 
   ScriptState::Scope scope(script_state_.Get());
 
   MaybeCreatePaintInstance();
 
   v8::Isolate* isolate = script_state_->GetIsolate();
   v8::Local<v8::Object> instance = instance_.NewLocal(isolate);
 
   // We may have failed to create an instance class, in which case produce an
@@ skipping 53 matching lines @@
   v8::Local<v8::Object> paint_instance;
   if (V8ObjectConstructor::NewInstance(isolate, constructor)
           .ToLocal(&paint_instance)) {
     instance_.Set(isolate, paint_instance);
   }
 
   did_call_constructor_ = true;
 }
 
 }  // namespace blink