[SPv2] Defer decision of raster invalidation after paint for changes z-index, transform, etc.

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

 // Copyright 2014 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/DisplayItem.h"
 
 namespace blink {
 
 struct SameSizeAsDisplayItem {
     virtual ~SameSizeAsDisplayItem() { } // Allocate vtable pointer.
@@ skipping 176 matching lines @@
         return drawingTypeAsDebugString(type);
 
     if (isForeignLayerType(type))
         return foreignLayerTypeAsDebugString(type);
 
     if (isClipType(type))
         return clipTypeAsDebugString(type);
     if (isEndClipType(type))
         return "End" + clipTypeAsDebugString(endClipTypeToClipType(type));
 
-    if (type == kUninitializedType)
-        return "UninitializedType";
-
     PAINT_PHASE_BASED_DEBUG_STRINGS(FloatClip);
     if (isEndFloatClipType(type))
         return "End" + typeAsDebugString(endFloatClipTypeToFloatClipType(type));
 
     if (isScrollType(type))
         return scrollTypeAsDebugString(type);
     if (isEndScrollType(type))
         return "End" + scrollTypeAsDebugString(endScrollTypeToScrollType(type));
 
     if (isTransform3DType(type))
         return transform3DTypeAsDebugString(type);
     if (isEndTransform3DType(type))
         return "End" + transform3DTypeAsDebugString(endTransform3DTypeToTransform3DType(type));
 
     switch (type) {
         DEBUG_STRING_CASE(BeginFilter);
         DEBUG_STRING_CASE(EndFilter);
         DEBUG_STRING_CASE(BeginCompositing);
         DEBUG_STRING_CASE(EndCompositing);
         DEBUG_STRING_CASE(BeginTransform);
         DEBUG_STRING_CASE(EndTransform);
         DEBUG_STRING_CASE(BeginClipPath);
         DEBUG_STRING_CASE(EndClipPath);
         DEBUG_STRING_CASE(Subsequence);
         DEBUG_STRING_CASE(EndSubsequence);
+        DEBUG_STRING_CASE(HasBeenMoved);
         DEBUG_STRING_CASE(UninitializedType);
         DEFAULT_CASE;
     }
 }
 
 WTF::String DisplayItem::asDebugString() const
 {
     WTF::StringBuilder stringBuilder;
     stringBuilder.append('{');
     dumpPropertiesAsDebugString(stringBuilder);
     stringBuilder.append('}');
     return stringBuilder.toString();
 }
 
 void DisplayItem::dumpPropertiesAsDebugString(WTF::StringBuilder& stringBuilder) const
 {
-    if (!hasValidClient()) {
-        stringBuilder.append("validClient: false, originalDebugString: ");
+    if (hasBeenMoved()) {
+        stringBuilder.append("movedTo: %zu, originalDebugString: ", movedToIndex());
         // This is the original debug string which is in json format.
         stringBuilder.append(clientDebugString());
         return;
     }
 
     stringBuilder.append(String::format("client: \"%p", &client()));
     if (!clientDebugString().isEmpty()) {
         stringBuilder.append(' ');
         stringBuilder.append(clientDebugString());
     }
     stringBuilder.append("\", type: \"");
     stringBuilder.append(typeAsDebugString(getType()));
     stringBuilder.append('"');
     if (m_skippedCache)
         stringBuilder.append(", skippedCache: true");
 }
 
 #endif
 
 } // namespace blink