Unconditionally disable flakily-crashing BrowserCloseManagerBrowserTest.TestSessionRestore

BUG=1145235
TBR=tedchoc@chromium.org

Change-Id: I83885281502a8dc338504f378063bf50c4641a24
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2517563
Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Matthew Wolenetz <wolenetz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823678}

chrome/browser/lifetime/browser_close_manager_browsertest.cc

@@ -398,13 +398,10 @@ IN_PROC_BROWSER_TEST_F(BrowserCloseManagerBrowserTest, PRE_TestSessionRestore) {
 // Test that the tab closed after the aborted shutdown attempt is not re-opened
 // when restoring the session.
 // Flaky on Windows trybots, see https://crbug.com/737860.
-#if defined(OS_WIN)
-#define MAYBE_TestSessionRestore DISABLED_TestSessionRestore
-#else
-#define MAYBE_TestSessionRestore TestSessionRestore
-#endif
+// Flaky on chromium.chromeos, chromium.linux, and chromium.mac bots. See
+// https://crbug.com/1145235.
 IN_PROC_BROWSER_TEST_F(BrowserCloseManagerBrowserTest,
-                       MAYBE_TestSessionRestore) {
+                       DISABLED_TestSessionRestore) {
   // The testing framework launches Chrome with about:blank as args.
   EXPECT_EQ(2, browser()->tab_strip_model()->count());
   EXPECT_EQ(GURL(chrome::kChromeUIVersionURL),