Refactor FilterData::state_ handling in SVGFilterPainter

third_party/WebKit/Source/core/paint/SVGFilterPainter.h

 // Copyright 2015 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.
 
 #ifndef SVGFilterPainter_h
 #define SVGFilterPainter_h
 
 #include <memory>
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/PaintController.h"
 #include "platform/wtf/Allocator.h"
 
 namespace blink {
 
-class FilterData;
 class LayoutObject;
 class LayoutSVGResourceFilter;
 
 class SVGFilterRecordingContext {
   USING_FAST_MALLOC(SVGFilterRecordingContext);
   WTF_MAKE_NONCOPYABLE(SVGFilterRecordingContext);
 
  public:
   explicit SVGFilterRecordingContext(GraphicsContext& initial_context)
       : initial_context_(initial_context) {}
 
-  GraphicsContext* BeginContent(FilterData*);
-  void EndContent(FilterData*);
+  GraphicsContext* BeginContent();
+  sk_sp<PaintRecord> EndContent(const FloatRect&);
 
   GraphicsContext& PaintingContext() const { return initial_context_; }
 
  private:
   std::unique_ptr<PaintController> paint_controller_;
   std::unique_ptr<GraphicsContext> context_;
   GraphicsContext& initial_context_;
 };
 
 class SVGFilterPainter {
   STACK_ALLOCATED();
 
  public:
   SVGFilterPainter(LayoutSVGResourceFilter& filter) : filter_(filter) {}
 
   // Returns the context that should be used to paint the filter contents, or
   // null if the content should not be recorded.
   GraphicsContext* PrepareEffect(const LayoutObject&,
                                  SVGFilterRecordingContext&);
   void FinishEffect(const LayoutObject&, SVGFilterRecordingContext&);
 
  private:
   LayoutSVGResourceFilter& filter_;
 };
 
 }  // namespace blink
 
 #endif  // SVGFilterPainter_h