Add GraphicsLayerDebugInfo::includesNewPaintInvalidation to distinguish paint from new RenderObjects

Source/core/rendering/RenderLayerRepainter.cpp

Index: Source/core/rendering/RenderLayerRepainter.cpp
diff --git a/Source/core/rendering/RenderLayerRepainter.cpp b/Source/core/rendering/RenderLayerRepainter.cpp
index 62336f563659bdeb02247c95cbe44d53d43ab0b1..39f7dbc89c94647d4d8ec82b12b96ff8ab36c695 100644
--- a/Source/core/rendering/RenderLayerRepainter.cpp
+++ b/Source/core/rendering/RenderLayerRepainter.cpp
@@ -121,6 +121,13 @@ void RenderLayerRepainter::setBackingNeedsPaintInvalidationInRect(const LayoutRe
     }
 }
 
+void RenderLayerRepainter::setBackingIncludesFirstPaintInvalidation()
+{
+    GraphicsLayer* backingLayer = m_renderer.layer()->graphicsLayerBacking();

[chrishtr, 2014/08/25 16:55:05]

Per comment in RenderObject, get rid of this method and inline into
setNeedsPaintInvaliationInRect. The backingLayer will always be present there as
well.

[kouhei (in TOK), 2014/08/26 14:18:18]

Done.

+    if (backingLayer)
+        backingLayer->setIncludesFirstPaintInvalidation();
+}
+
 void RenderLayerRepainter::setFilterBackendNeedsPaintInvalidationInRect(const LayoutRect& rect)
 {
     if (rect.isEmpty())