+++ This bug was initially created as a clone of Bug #18662 +++ The core patch has landed (see https://bugs.webkit.org/show_bug.cgi?id=18662#c74). THe Layout tests have not landed though (see attachment https://bugs.webkit.org/attachment.cgi?id=49076), but two (r55577 and r55578). I am cloning bug 18662 here to track the missing Layout Testes landing.
Created attachment 50271 [details] (committed in r55794) patch_1 v0.1 - tests the fully aligned procedence logic of Spatial Navigation
Created attachment 50272 [details] (committed in r55795) patch_2 v0.1 - tests unit overflow during Spatial Navigation algorithm calculations
Created attachment 50273 [details] (committed in r55796) patch_3 v0.1 - tests iframe traversal by Spatial Navigation
Created attachment 50274 [details] (committed in r55797) patch_4 - v0.1 - manual tests for Spatial Navigation Adds a manual tests for the Spatial Navigation feature comprasing varios Html focusable elements (e.g. <a>, <table>, <iframe>) and much of the logic provided by the feature.
Comment on attachment 50274 [details] (committed in r55797) patch_4 - v0.1 - manual tests for Spatial Navigation r=me
Comment on attachment 50271 [details] (committed in r55794) patch_1 v0.1 - tests the fully aligned procedence logic of Spatial Navigation r=me
Comment on attachment 50272 [details] (committed in r55795) patch_2 v0.1 - tests unit overflow during Spatial Navigation algorithm calculations r=me
Comment on attachment 50273 [details] (committed in r55796) patch_3 v0.1 - tests iframe traversal by Spatial Navigation r=me
Tests landed: thx Dave