Invalidate subsequence caching & empty paint phases if clips changed.

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp b/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
index 71ca7ffce91824c526d46d28b7951f5b043bc3f2..063bce36ec846324a9862151966ec8b2671e8c90 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp
@@ -226,9 +226,8 @@ static bool shouldRepaintSubsequence(
     needsRepaint = true;
 
   // Repaint if layer's clip changes.
-  // TODO(chrishtr): implement detecting clipping changes in SPv2.
-  // crbug.com/645667
-  if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
+  if (!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled()) {
+    LOG(ERROR) << "oh";
     ClipRects& clipRects = paintLayer.clipper().paintingClipRects(
         paintingInfo.rootLayer, respectOverflowClip, subpixelAccumulation);
     ClipRects* previousClipRects = paintLayer.previousPaintingClipRects();