Remove cullRect() from PaintOpBuffer.

cc/paint/drawing_display_item.cc

Index: cc/paint/drawing_display_item.cc
diff --git a/cc/paint/drawing_display_item.cc b/cc/paint/drawing_display_item.cc
index f8819c01e9864f1805cdc283ee70f7b2e31a14f0..4b3558efb8b37c806102556669895b9ba8b4be43 100644
--- a/cc/paint/drawing_display_item.cc
+++ b/cc/paint/drawing_display_item.cc
@@ -10,8 +10,9 @@ namespace cc {
 
 DrawingDisplayItem::DrawingDisplayItem() : DisplayItem(DRAWING) {}
 
-DrawingDisplayItem::DrawingDisplayItem(sk_sp<const PaintRecord> record)
-    : DisplayItem(DRAWING), picture(std::move(record)) {}
+DrawingDisplayItem::DrawingDisplayItem(sk_sp<const PaintRecord> record,
+                                       const SkRect& bounds)
+    : DisplayItem(DRAWING), picture(std::move(record)), bounds(bounds) {}
 
 DrawingDisplayItem::DrawingDisplayItem(const DrawingDisplayItem& item)
     : DisplayItem(DRAWING), picture(item.picture) {}

[danakj, 2017/05/19 15:30:10]

I think this is the MSAN failure. The copy constructor doesn't copy the |bounds|
from the other item. I will confirm, also verify if this is what's causing the
disappearing UI things, probably it is.