cc : Use dynamically calculated target space transforms

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index c6ee0ab1f2ac1ade25b6e9ab6f2129c0a7488faf..01652a035ad00d8d8639c0fc77025e23ddf334c2 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -803,8 +803,8 @@ void ComputeClips(PropertyTrees* property_trees,
     if (parent_target_transform_node &&
         parent_target_transform_node->id != clip_node->target_transform_id &&
         non_root_surfaces_enabled) {
-      success &= property_trees->ComputeTransformToTarget(
-          parent_target_transform_node->id, clip_node->target_effect_id,
+      success &= property_trees->ComputeTransformFromTarget(
+          clip_node->target_transform_id, parent_clip_node->target_effect_id,

[jaydasika, 2016/07/28 22:55:56]

I am changing it to force it to take the dynamically calculated value
path(otherwise they are equivalent). This is the inverse of surface draw
transform, so I think it makes more sense to compute from target.(which is most
likely already in the cache as we would have calculated in in
SetSurfaceDrawTransform).

           &parent_to_current);
       // We don't have to apply surface contents scale when target is root.
       if (clip_node->target_effect_id != EffectTree::kContentsRootNodeId) {