cc : Compute visible rects dynamically (1)

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index 2019af905ce31c2200e0a6666396c3fee33e402e..e88ca59326e95883f82ae71c73308a8194a81430 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -250,7 +250,9 @@ class CC_EXPORT LayerTreeImpl {
   // Updates draw properties and render surface layer list, as well as tile
   // priorities. Returns false if it was unable to update.  Updating lcd
   // text may cause invalidations, so should only be done after a commit.
-  bool UpdateDrawProperties(bool update_lcd_text);
+  bool UpdateDrawProperties(
+      bool update_lcd_text,
+      bool force_skip_verify_visible_rect_calculations = false);
   void BuildPropertyTreesForTesting();
   void BuildLayerListAndPropertyTreesForTesting();