cc: Remove tile sharing from tilings.

cc/resources/picture_layer_tiling_set.cc

Index: cc/resources/picture_layer_tiling_set.cc
diff --git a/cc/resources/picture_layer_tiling_set.cc b/cc/resources/picture_layer_tiling_set.cc
index 93d85f7b22e33212fc4ef30436317bd6f8978d6e..a5d71dd28f94a12b96090690bc13e1b9e5dfb7dd 100644
--- a/cc/resources/picture_layer_tiling_set.cc
+++ b/cc/resources/picture_layer_tiling_set.cc
@@ -77,7 +77,7 @@ void PictureLayerTilingSet::CopyTilingsAndPropertiesFromPendingTwin(
       this_tiling = tilings_.back();
       tiling_sort_required = true;
     }
-    this_tiling->CloneTilesAndPropertiesFrom(*pending_twin_tiling);
+    this_tiling->TakeTilesAndPropertiesFrom(pending_twin_tiling);
   }
 
   if (tiling_sort_required)
@@ -146,6 +146,9 @@ void PictureLayerTilingSet::UpdateRasterSourceDueToLCDChange(
   for (PictureLayerTiling* tiling : tilings_) {
     tiling->SetRasterSourceAndResize(raster_source);
     tiling->Invalidate(layer_invalidation);
+    // Since the invalidation changed, we need to create any missing tiles in
+    // the live tiles rect again.
+    tiling->CreateMissingTilesInLiveTilesRect();
     tiling->VerifyAllTilesHaveCurrentRasterSource();
   }
 }