Bug 1507258 [wpt PR 14059] - Update wpt metadata, a=testonly

wpt-pr: 14059 wpt-type: metadata
2018-11-15 05:02:33 +00:00 · 2018-11-15 05:02:33 +00:00 · cd09d173b0
--- a/testing/web-platform/meta/pointerevents/pointerevent_setpointercapture_inactive_button_mouse.html.ini
+++ b/testing/web-platform/meta/pointerevents/pointerevent_setpointercapture_inactive_button_mouse.html.ini
@ -0,0 +1,2 @@
+[pointerevent_setpointercapture_inactive_button_mouse.html]
+  expected: TIMEOUT
--- a/testing/web-platform/meta/uievents/mouse/mouse_buttons_back_forward.html.ini
+++ b/testing/web-platform/meta/uievents/mouse/mouse_buttons_back_forward.html.ini
@ -0,0 +1,2 @@
+[mouse_buttons_back_forward.html]
+  max-asserts: 2