Picture-in-Picture: disabling flaky tests while origin is investigated.

Bug: 862505
Change-Id: I1bcb2019be64dbb91081e1f8d607aca4cb0fbdc5
TBR: apacible@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1133306Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574176}

chrome/browser/picture_in_picture/picture_in_picture_window_controller_browsertest.cc

@@ -782,8 +782,9 @@ IN_PROC_BROWSER_TEST_F(PictureInPictureWindowControllerBrowserTest,
 
 // Tests that when a new surface id is sent to the Picture-in-Picture window, it
 // doesn't move back to its default position.
+// TODO(https://crbug.com/862505): test is currently flaky.
 IN_PROC_BROWSER_TEST_F(PictureInPictureWindowControllerBrowserTest,
-                       SurfaceIdChangeDoesNotMoveWindow) {
+                       DISABLED_SurfaceIdChangeDoesNotMoveWindow) {
   LoadTabAndEnterPictureInPicture(browser());
 
   content::WebContents* active_web_contents =