Consider ClipPathDisplayItems for GPU veto.

third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.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 "platform/graphics/paint/DisplayItemList.h"
 
 #include "platform/graphics/paint/DrawingDisplayItem.h"
 #include "platform/graphics/paint/PaintChunk.h"
 #include "third_party/skia/include/core/SkPictureAnalyzer.h"
 
 #ifndef NDEBUG
 #include "wtf/text/WTFString.h"
 #endif
 
 namespace blink {
 
 DisplayItem& DisplayItemList::appendByMoving(DisplayItem& item, const IntRect& visualRect, SkPictureGpuAnalyzer& gpuAnalyzer)
 {
-    if (item.isDrawing())
-        gpuAnalyzer.analyze(static_cast<const DrawingDisplayItem&>(item).picture());
+    // No reason to continue the analysis once we have a veto.
+    if (gpuAnalyzer.suitableForGpuRasterization())
+        item.analyzeForGpuRasterization(gpuAnalyzer);
 
 #ifndef NDEBUG
     String originalDebugString = item.asDebugString();
 #endif
     ASSERT(item.hasValidClient());
     DisplayItem& result = ContiguousContainer::appendByMoving(item, item.derivedSize());
     // ContiguousContainer::appendByMoving() calls an in-place constructor
     // on item which replaces it with a tombstone/"dead display item" that
     // can be safely destructed but should never be used.
     ASSERT(!item.hasValidClient());
@@ skipping 45 matching lines @@
     return Range<iterator>(begin() + paintChunk.beginIndex, begin() + paintChunk.endIndex);
 }
 
 DisplayItemList::Range<DisplayItemList::const_iterator>
 DisplayItemList::itemsInPaintChunk(const PaintChunk& paintChunk) const
 {
     return Range<const_iterator>(begin() + paintChunk.beginIndex, begin() + paintChunk.endIndex);
 }
 
 } // namespace blink