Store recording invalidations in DisplayListRecordingSource, save them via Update.

cc/debug/debug_rect_history.cc

Index: cc/debug/debug_rect_history.cc
diff --git a/cc/debug/debug_rect_history.cc b/cc/debug/debug_rect_history.cc
index 5ac2b5d8b55368b84b0f1e71fb0a62a350e8f04b..bbeb1b93693718728e22817cc4d0e99f638bf796 100644
--- a/cc/debug/debug_rect_history.cc
+++ b/cc/debug/debug_rect_history.cc
@@ -67,8 +67,8 @@ void DebugRectHistory::SaveDebugRectsForCurrentFrame(
 void DebugRectHistory::SavePaintRects(LayerImpl* layer) {
   // We would like to visualize where any layer's paint rect (update rect) has
   // changed, regardless of whether this layer is skipped for actual drawing or
-  // not. Therefore we traverse recursively over all layers, not just the render
-  // surface list.
+  // not. Therefore we traverse over all layers, not just the render surface
+  // list.
 
   Region invalidation_region = layer->GetInvalidationRegion();
   if (!invalidation_region.IsEmpty() && layer->DrawsContent()) {