Makes tile-creation lazy

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 8d98d66653e9ead11f6243660e10b37cf5237cc6..ed4bfdfc19b85a2a79f7f7956dc2863c4d9a1850 100644
--- a/cc/resources/picture_layer_tiling_set.cc
+++ b/cc/resources/picture_layer_tiling_set.cc
@@ -34,20 +34,18 @@ void PictureLayerTilingSet::SetClient(PictureLayerTilingClient* client) {
 
 void PictureLayerTilingSet::CloneAll(
     const PictureLayerTilingSet& other,
-    const Region& invalidation,
     float minimum_contents_scale) {
   tilings_.clear();
   tilings_.reserve(other.tilings_.size());
   for (size_t i = 0; i < other.tilings_.size(); ++i) {
     if (other.tilings_[i]->contents_scale() < minimum_contents_scale)
       continue;
-    Clone(other.tilings_[i], invalidation);
+    Clone(other.tilings_[i]);
   }
 }
 
 void PictureLayerTilingSet::Clone(
-    const PictureLayerTiling* tiling,
-    const Region& invalidation) {
+    const PictureLayerTiling* tiling) {

[enne (OOO), 2013/03/29 20:50:58]

style nit: this can fit on one line now.

[whunt, 2013/03/29 21:52:04]

Done.

 
   for (size_t i = 0; i < tilings_.size(); ++i)
     DCHECK_NE(tilings_[i]->contents_scale(), tiling->contents_scale());
@@ -55,7 +53,6 @@ void PictureLayerTilingSet::Clone(
   tilings_.push_back(tiling->Clone());
   gfx::Size size = tilings_.back()->layer_bounds();
   tilings_.back()->SetClient(client_);
-  tilings_.back()->Invalidate(invalidation);
   // Intentionally use this set's layer bounds, as it may have changed.
   tilings_.back()->SetLayerBounds(layer_bounds_);
 
@@ -74,11 +71,6 @@ gfx::Size PictureLayerTilingSet::LayerBounds() const {
   return layer_bounds_;
 }
 
-void PictureLayerTilingSet::Invalidate(const Region& layer_invalidation) {
-  for (size_t i = 0; i < tilings_.size(); ++i)
-    tilings_[i]->Invalidate(layer_invalidation);
-}
-
 PictureLayerTiling* PictureLayerTilingSet::AddTiling(float contents_scale) {
   tilings_.push_back(PictureLayerTiling::Create(contents_scale));
   PictureLayerTiling* appended = tilings_.back();
@@ -106,11 +98,6 @@ void PictureLayerTilingSet::RemoveAllTiles() {
     tilings_[i]->Reset();
 }
 
-void PictureLayerTilingSet::CreateTilesFromLayerRect(gfx::Rect layer_rect) {
-  for (size_t i = 0; i < tilings_.size(); ++i)
-    tilings_[i]->CreateTilesFromLayerRect(layer_rect);
-}
-
 PictureLayerTilingSet::Iterator::Iterator(
     const PictureLayerTilingSet* set,
     float contents_scale,