SPv2: Add support for tracking raster paint invalidations in testing.

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.h

Index: third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.h
diff --git a/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.h b/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.h
index 09471226ed730b1212a0a63f8f678560277cc325..a6cb63b701718cba161deca000973e8c6ed272f9 100644
--- a/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.h
+++ b/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.h
@@ -7,6 +7,8 @@
 
 #include "base/memory/ref_counted.h"
 #include "platform/PlatformExport.h"
+#include "platform/RuntimeEnabledFeatures.h"
+#include "platform/graphics/GraphicsLayerClient.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/Vector.h"
@@ -23,6 +25,9 @@ class Vector2dF;
 
 namespace blink {
 
+class DisplayItemClient;
+class IntRect;
+class JSONObject;
 class PaintArtifact;
 class WebLayer;
 struct PaintChunk;
@@ -64,6 +69,12 @@ public:
     void enableExtraDataForTesting() { m_extraDataForTestingEnabled = true; }
     ExtraDataForTesting* getExtraDataForTesting() const { return m_extraDataForTesting.get(); }
 
+    void setTracksPaintInvalidations(bool);
+    void resetTrackedPaintInvalidations();
+    bool hasTrackedPaintInvalidations() const;
+
+    std::unique_ptr<JSONObject> layersAsJSON(LayerTreeFlags) const;
+
 private:
     PaintArtifactCompositor();
 
@@ -79,7 +90,7 @@ private:
 
     // Finds a client among the current vector of clients that matches the paint chunk's id,
     // or otherwise allocates a new one.
-    std::unique_ptr<ContentLayerClientImpl> clientForPaintChunk(const PaintChunk&);
+    std::unique_ptr<ContentLayerClientImpl> clientForPaintChunk(const PaintChunk&, const PaintArtifact&);
 
     scoped_refptr<cc::Layer> m_rootLayer;
     std::unique_ptr<WebLayer> m_webLayer;
@@ -88,6 +99,8 @@ private:
     bool m_extraDataForTestingEnabled = false;
     std::unique_ptr<ExtraDataForTesting> m_extraDataForTesting;
     friend class StubChromeClientForSPv2;
+
+    bool m_isTrackingPaintInvalidations;
 };
 
 } // namespace blink