Smart layer invalidation for LCD text.

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 b5460b9dddf419538f44a387ab63b30a0a7d06a6..1b26e56c2b26733fc6843b435445ae1f98654000 100644
--- a/cc/resources/picture_layer_tiling_set.cc
+++ b/cc/resources/picture_layer_tiling_set.cc
@@ -81,6 +81,11 @@ void PictureLayerTilingSet::Invalidate(const Region& layer_invalidation) {
     tilings_[i]->Invalidate(layer_invalidation);
 }
 
+void PictureLayerTilingSet::InvalidateTilesWithText() {
+  for (size_t i = 0; i < tilings_.size(); ++i)
+    tilings_[i]->InvalidateTilesWithText();
+}
+
 PictureLayerTiling* PictureLayerTilingSet::AddTiling(float contents_scale) {
   tilings_.push_back(PictureLayerTiling::Create(contents_scale));
   PictureLayerTiling* appended = tilings_.back();