Disable some flaky AppControllerNewProfileManagementBrowserTests on ASAN

chrome/browser/app_controller_mac_browsertest.mm

Index: chrome/browser/app_controller_mac_browsertest.mm
diff --git a/chrome/browser/app_controller_mac_browsertest.mm b/chrome/browser/app_controller_mac_browsertest.mm
index 07eddc09d5df52cd6f9cf01ebb875d7440277782..52ced35b3bf71e57ea06ff5b41e58e875d55a644 100644
--- a/chrome/browser/app_controller_mac_browsertest.mm
+++ b/chrome/browser/app_controller_mac_browsertest.mm
@@ -279,9 +279,15 @@ IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
   UserManager::Hide();
 }
 
+#if defined(ADDRESS_SANITIZER)
+// Flaky under ASAN. See https://crbug.com/674475.
+#define MAYBE_GuestProfileReopenWithNoWindows DISABLED_GuestProfileReopenWithNoWindows
+#else
+#define MAYBE_GuestProfileReopenWithNoWindows GuestProfileReopenWithNoWindows
+#endif
 // Test that for a guest last profile, a reopen event opens the User Manager.
 IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
-                       GuestProfileReopenWithNoWindows) {
+                       MAYBE_GuestProfileReopenWithNoWindows) {
   // Create the system profile. Set the guest as the last used profile so the
   // app controller can use it on init.
   CreateAndWaitForSystemProfile();
@@ -305,8 +311,14 @@ IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
   UserManager::Hide();
 }
 
+#if defined(ADDRESS_SANITIZER)
+// Flaky under ASAN. See https://crbug.com/674475.
+#define MAYBE_AboutChromeForcesUserManager DISABLED_AboutChromeForcesUserManager
+#else
+#define MAYBE_AboutChromeForcesUserManager AboutChromeForcesUserManager
+#endif
 IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
-                       AboutChromeForcesUserManager) {
+                       MAYBE_AboutChromeForcesUserManager) {
   base::scoped_nsobject<AppController> ac([[AppController alloc] init]);
 
   // Create the guest profile, and set it as the last used profile so the