cc: Complete pending tile uploads if they are needed for tree activation

cc/picture_layer_impl.cc

Index: cc/picture_layer_impl.cc
diff --git a/cc/picture_layer_impl.cc b/cc/picture_layer_impl.cc
index e4bb4441ad584481392cd28348ba3271cd361691..48ae6d5c0927ac0abd002ceb42b0c1d942a60dbe 100644
--- a/cc/picture_layer_impl.cc
+++ b/cc/picture_layer_impl.cc
@@ -508,6 +508,8 @@ bool PictureLayerImpl::areVisibleResourcesReady() const {
                                            PictureLayerTiling::LayerDeviceAlignmentUnknown);
          iter;
          ++iter) {
+      if (iter)
+        layerTreeImpl()->tile_manager()->FlushPendingTileUploadIfNeeded(*iter);

[reveman, 2013/03/07 20:31:58]

We should avoid this when in "smoothness takes priority" mode. Probably also
when animations are running. I think should be as conservative as possible in
this first patch to prevent any kind of smoothness regression.

[Sami, 2013/03/08 18:01:10]

Agreed, let's be careful about this. I've added a check for smoothness and
animations.

       // A null tile (i.e. no recording) is considered "ready".
       if (!*iter || iter->GetResourceId())
         missing_region.Subtract(iter.geometry_rect());