Add GraphicsLayerDebugInfo::includesNewPaintInvalidation to distinguish paint from new RenderObjects

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index cb6890fc7fbb2181ff07bf906bad36f7c4adef6c..6f02bfe99ec2af9d8c54d7347ba194dcd44b06f5 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -1672,6 +1672,10 @@ InvalidationReason RenderObject::invalidatePaintIfNeeded(const RenderLayerModelO
         return invalidationReason;
     }
 
+    if (view()->usesCompositing() && !everHadPaintInvalidation())
+        paintInvalidationContainer.layer()->paintInvalidator().setBackingIncludesFirstPaintInvalidation();
+    setEverHadPaintInvalidation(true);

[chrishtr, 2014/08/20 17:10:31]

I think this should go in RenderObject::invalidatePaintUsingContainer()

[kouhei (in TOK), 2014/08/21 04:42:53]

Hmm. RenderObject::invalidatePaintUsingContainer() is const, and is being called
from const methods, so it will end up changing constness of many methods. I'm
not sure if we want to do that.

[chrishtr, 2014/08/21 21:28:34]

Well we need to make sure it's hit in all cases. So long as that holds then ok.

[kouhei (in TOK), 2014/08/25 01:57:58]

Done.

+
     fullyInvalidatePaint(paintInvalidationContainer, invalidationReason, oldBounds, newBounds);
     return invalidationReason;
 }