commit 62bd3dd1ed8ebf397650785d3a4599eebff06d26
author jaydasika <jaydasika@chromium.org> Thu Feb 04 18:52:55 2016
committer Commit bot <commit-bot@chromium.org> Thu Feb 04 18:54:05 2016
tree a4077e93285a624294408f2d4d3854fb0c7f66c9
parent 748157f70e3fd74e4cb4fe542351eac25c9adfa3

cc :: Layer backface visibility determination without layer tree hierarchy

This CL
  * adds bools use_local_transform_for_backface_visibility
    and should_check_backface_visibility to Layer and
    LayerImpl.
  * does backface visibility computation only when
    needed (using the bools and transform tree)

BUG=581939
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1652263004

Cr-Commit-Position: refs/heads/master@{#373574}

cc/layers/layer_impl.cc

diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 708c8d2..173237a 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -71,6 +71,8 @@
       contents_opaque_(false),
       is_root_for_isolated_group_(false),
       use_parent_backface_visibility_(false),
+      use_local_transform_for_backface_visibility_(false),
+      should_check_backface_visibility_(false),
       draws_content_(false),
       hide_layer_and_subtree_(false),
       transform_is_invertible_(true),
@@ -628,6 +630,9 @@
       should_flatten_transform_from_property_tree_);
   layer->set_draw_blend_mode(draw_blend_mode_);
   layer->SetUseParentBackfaceVisibility(use_parent_backface_visibility_);
+  layer->SetUseLocalTransformForBackfaceVisibility(
+      use_local_transform_for_backface_visibility_);
+  layer->SetShouldCheckBackfaceVisibility(should_check_backface_visibility_);
   layer->SetTransformAndInvertibility(transform_, transform_is_invertible_);
 
   layer->SetScrollClipLayer(scroll_clip_layer_id_);