cc: Resize picture layer tiling set during commit

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 7e67d001574a377b75818d9429ab68e58e19ef36..9f814a514e2677403f67c4c2ca25acdae13a9c46 100644
--- a/cc/picture_layer_impl.cc
+++ b/cc/picture_layer_impl.cc
@@ -129,7 +129,6 @@ void PictureLayerImpl::dumpLayerProperties(std::string*, int indent) const {
 
 void PictureLayerImpl::didUpdateTransforms() {
   if (drawsContent()) {
-    tilings_.SetLayerBounds(bounds());
     // TODO(enne): Add more tilings during pinch zoom.
     if (!tilings_.num_tilings()) {
       gfx::Size tile_size = layerTreeHostImpl()->settings().defaultTileSize;
@@ -165,6 +164,10 @@ void PictureLayerImpl::didUpdateTransforms() {
   last_content_scale_y_ = contentsScaleY();
 }
 
+void PictureLayerImpl::didUpdateBounds() {
+  tilings_.SetLayerBounds(bounds());
+}
+
 scoped_refptr<Tile> PictureLayerImpl::CreateTile(PictureLayerTiling* tiling,
                                                  gfx::Rect rect) {
   TileManager* tile_manager = layerTreeHostImpl()->tileManager();