SetNeedsRedraw directly when updating a visible tile.

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index 49be8c2aaaa5c082979a966c43a3f388f5b386d9..c145db56b632ced05971df456da8814984fae5b6 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -1439,8 +1439,7 @@ bool PictureLayerImpl::AllTilesRequiredAreReadyToDraw(
       // from the tile.
       if (is_tile_required_callback.Run(tiling, tile) &&
           !tile->IsReadyToDraw()) {
-        TRACE_EVENT_INSTANT0("cc",
-                             "Tile required, but not ready to draw.",
+        TRACE_EVENT_INSTANT0("cc", "Tile required, but not ready to draw.",
                              TRACE_EVENT_SCOPE_THREAD);
         return false;
       }