Consider ClipPathDisplayItems for GPU veto.

third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h

Index: third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h b/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
index 09dbf633de5a044fc8562ba5098ad90731426857..a5304a5a1b70948a6037fd3b4ad148f5e444ca70 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.h
@@ -18,6 +18,7 @@
 #include "wtf/text/WTFString.h"
 #endif
 
+class SkPictureGpuAnalyzer;
 
 namespace blink {
 
@@ -350,6 +351,9 @@ public:
 
     virtual bool drawsContent() const { return false; }
 
+    // Override to implement specific analysis strategies.
+    virtual void analyzeForGpuRasterization(SkPictureGpuAnalyzer&) const { }
+
 #ifndef NDEBUG
     static WTF::String typeAsDebugString(DisplayItem::Type);
     const WTF::String clientDebugString() const { return m_clientDebugString; }