Rename repaint to paintInvalidation in core/rendering/compositing.

Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp

Index: Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
diff --git a/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp b/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
index 5c006ae3fc2401408aa6e5deaf3be93b240d4520..878776aa162aeb51db7f8867d15f30d67e0bb1ab 100644
--- a/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
+++ b/Source/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
@@ -59,7 +59,7 @@ void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
 {
     // Make the layer compositing if necessary, and set up clipping and content layers.
     // Note that we can only do work here that is independent of whether the descendant layers
-    // have been processed. computeCompositingRequirements() will already have done the repaint if necessary.
+    // have been processed. computeCompositingRequirements() will already have done the paint invalidation if necessary.
 
     layer.stackingNode()->updateLayerListsIfNeeded();