Rebuild property_tree after LayerImpl::SetTransform() is called in tests

This fixes test LayerTreeHostCommonTest.MaximumAnimationScaleFactor

If LayerImpl::SetTransform() is called, we need to rebuild/update the
property_tree.

In practice, LayerImpl::SetTransform() is only called through
LayerImpl::OnTransformAnimated(), where we already do property tree
update.

In test LayerImpl::SetTranform() can be triggered by itself, in
this case, lets just force a property rebuild.

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1179003002

Cr-Commit-Position: refs/heads/master@{#334050}

1 files changed, 4 insertions, 0 deletions

diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
index c9ff620..fa9563f 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -8227,6 +8227,7 @@ TEST_F(LayerTreeHostCommonTest, MaximumAnimationScaleFactor) {
   scale_matrix.Scale(1.f, 2.f);
   grand_parent->SetTransform(scale_matrix);
   parent_raw->SetTransform(scale_matrix);
+  grand_parent->layer_tree_impl()->property_trees()->needs_rebuild = true;
   AddAnimatedTransformToLayer(parent_raw, 1.0, TransformOperations(), scale);
   ExecuteCalculateDrawProperties(grand_parent.get());
 
@@ -8245,6 +8246,7 @@ TEST_F(LayerTreeHostCommonTest, MaximumAnimationScaleFactor) {
   gfx::Transform perspective_matrix;
   perspective_matrix.ApplyPerspectiveDepth(2.f);
   child_raw->SetTransform(perspective_matrix);
+  grand_parent->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent.get());
 
   // |child| has a transform that's neither a translation nor a scale.
@@ -8257,6 +8259,7 @@ TEST_F(LayerTreeHostCommonTest, MaximumAnimationScaleFactor) {
       0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
 
   parent_raw->SetTransform(perspective_matrix);
+  grand_parent->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent.get());
 
   // |parent| and |child| have transforms that are neither translations nor
@@ -8272,6 +8275,7 @@ TEST_F(LayerTreeHostCommonTest, MaximumAnimationScaleFactor) {
   parent_raw->SetTransform(identity_matrix);
   child_raw->SetTransform(identity_matrix);
   grand_parent->SetTransform(perspective_matrix);
+  grand_parent->layer_tree_impl()->property_trees()->needs_rebuild = true;
 
   ExecuteCalculateDrawProperties(grand_parent.get());