Make DisplayItemClient an interface

third_party/WebKit/Source/platform/graphics/paint/PaintArtifactToSkCanvasTest.cpp

 // 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.
 
 #include "config.h"
 #include "platform/graphics/paint/PaintArtifactToSkCanvas.h"
 
 #include "platform/graphics/paint/DisplayItem.h"
 #include "platform/graphics/paint/DrawingDisplayItem.h"
 #include "platform/graphics/paint/PaintArtifact.h"
@@ skipping 43 matching lines @@
         onDrawRect(rect, paint, this);
     }
 
     SaveLayerStrategy willSaveLayer(const SkRect* rect, const SkPaint* paint, SaveFlags saveFlags) override
     {
         willSaveLayer(paint->getAlpha(), this);
         return SaveLayerStrategy::kFullLayer_SaveLayerStrategy;
     }
 };
 
-class DummyRectClient {
+class DummyRectClient : public DisplayItemClient {
 public:
     DummyRectClient(const SkRect& rect, SkColor color) : m_rect(rect), m_color(color) {}
     const SkRect& rect() const { return m_rect; }
     SkColor color() const { return m_color; }
     PassRefPtr<SkPicture> makePicture() const { return pictureWithRect(m_rect, m_color); }
-    DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
-    String debugName() const { return "<dummy>"; }
+    String debugName() const final { return "<dummy>"; }
 
 private:
     SkRect m_rect;
     SkColor m_color;
 };
 
 TEST(PaintArtifactToSkCanvasTest, Empty)
 {
     MockCanvas canvas(kCanvasWidth, kCanvasHeight);
     EXPECT_CALL(canvas, onDrawRect(_, _, _)).Times(0);
@@ skipping 203 matching lines @@
     totalClip.setRect(SkIRect::MakeXYWH(100, 100, 100, 100));
     totalClip.op(SkIRect::MakeXYWH(150, 150, 100, 100), SkRegion::kIntersect_Op);
     EXPECT_CALL(canvas, onDrawRect(client1.rect(), Property(&SkPaint::getColor, client1.color()),
         ResultOf(&getCanvasClipAsRegion, Eq(totalClip))));
 
     paintArtifactToSkCanvas(artifact, &canvas);
 }
 
 } // namespace
 } // namespace blink