mac-arm64: disable SessionRestoreTest.NormalAndPopup

It is very flaky on arm64.

Bug: 1154345
Change-Id: I7305f56291c191fcdcec6c6c89408459d53a13ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2580165
Commit-Queue: Chris Hamilton <chrisha@chromium.org>
Reviewed-by: Chris Hamilton <chrisha@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835089}

chrome/browser/sessions/session_restore_browsertest.cc

@@ -555,7 +555,13 @@ IN_PROC_BROWSER_TEST_F(SessionRestoreTest, MaximizedApps) {
 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)
 
 // Creates a tabbed browser and popup and makes sure we restore both.
-IN_PROC_BROWSER_TEST_F(SessionRestoreTest, NormalAndPopup) {
+#if defined(OS_MAC) && defined(ARCH_CPU_ARM64)
+// Disabled for mac-arm64 bot stabilization: https://crbug.com/1154345
+#define MAYBE_NormalAndPopup DISABLED_NormalAndPopup
+#else
+#define MAYBE_NormalAndPopup NormalAndPopup
+#endif
+IN_PROC_BROWSER_TEST_F(SessionRestoreTest, MAYBE_NormalAndPopup) {
   // Open a popup.
   Browser* popup = CreateBrowserForPopup(browser()->profile());
   ASSERT_EQ(2u, active_browser_list_->size());