Mark some non-spinvalidation methods deprecated, and update paint/README.md

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 548907dd20a6eab1e2352cd7e13ca31bc82a21bd..5719e404b538bd0c67df7793c14f850aaec4227a 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -1885,7 +1885,7 @@ void LayoutBox::EnsureIsReadyForPaintInvalidation() {
   SetShouldDoFullPaintInvalidationWithoutGeometryChange(kPaintInvalidationFull);
 }
 
-PaintInvalidationReason LayoutBox::InvalidatePaint(
+PaintInvalidationReason LayoutBox::DeprecatedInvalidatePaint(
     const PaintInvalidationState& paint_invalidation_state) {
   if (HasBoxDecorationBackground()
       // We also paint overflow controls in background phase.
@@ -1895,7 +1895,8 @@ PaintInvalidationReason LayoutBox::InvalidatePaint(
       layer.SetNeedsPaintPhaseDescendantBlockBackgrounds();
   }
 
-  return LayoutBoxModelObject::InvalidatePaint(paint_invalidation_state);
+  return LayoutBoxModelObject::DeprecatedInvalidatePaint(
+      paint_invalidation_state);
 }
 
 PaintInvalidationReason LayoutBox::InvalidatePaint(