Picture-in-Picture: disable flaky PictureInPictureWindowControllerBrowserTest.

Bug: 855883
Change-Id: I383e660319c86bf64872d2183cb36998cabbffe8
TBR: mlamouri@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1112945Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569898}

chrome/browser/picture_in_picture/picture_in_picture_window_controller_browsertest.cc

@@ -684,8 +684,16 @@ IN_PROC_BROWSER_TEST_F(PictureInPictureWindowControllerBrowserTest,
   EXPECT_FALSE(window_controller()->GetWindowForTesting()->IsVisible());
 }
 
+#if defined(OS_CHROMEOS)
+#define MAYBE_MultipleBrowserWindowOnePIPWindow \
+  DISABLED_MultipleBrowserWindowOnePIPWindow
+#else
+#define MAYBE_MultipleBrowserWindowOnePIPWindow \
+  MultipleBrowserWindowOnePIPWindow
+#endif
+
 IN_PROC_BROWSER_TEST_F(PictureInPictureWindowControllerBrowserTest,
-                       MultipleBrowserWindowOnePIPWindow) {
+                       MAYBE_MultipleBrowserWindowOnePIPWindow) {
   LoadTabAndEnterPictureInPicture(browser());
 
   content::PictureInPictureWindowController* first_controller =