Disable MultiProfileFileManagerBrowserTest on LSAN and MSAN

There are flaky failures in ash::tray::MultiProfileMediaTrayView
likely due to a race between media capture code's idea of the
number of users vs. ash::SessionController's idea of the number of
users.

Disable the test while that gets sorted out.

TBR=xiyuan@chromium.org

Tbr: xiyuan@chromium.org
Bug: 842442
Test: browser_tests
Change-Id: I8f80484190830aafb45ce4683be12206708d3ecc
Reviewed-on: https://chromium-review.googlesource.com/1059704Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558732}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -533,22 +533,45 @@ class MultiProfileFileManagerBrowserTest : public FileManagerBrowserTestBase {
   DISALLOW_COPY_AND_ASSIGN(MultiProfileFileManagerBrowserTest);
 };
 
-IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest, PRE_BasicDownloads) {
+// Flaky crashes in ash::tray::MultiProfileMediaTrayView.
+// https://crbug.com/842442
+#if defined(MEMORY_SANITIZER) || defined(ADDRESS_SANITIZER) || \
+    defined(LEAK_SANITIZER)
+#define MAYBE_PRE_BasicDownloads DISABLED_PRE_BasicDownloads
+#define MAYBE_BasicDownloads DISABLED_BasicDownloads
+#else
+#define MAYBE_PRE_BasicDownloads PRE_BasicDownloads
+#define MAYBE_BasicDownloads BasicDownloads
+#endif
+IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest,
+                       MAYBE_PRE_BasicDownloads) {
   AddAllUsers();
 }
 
-IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest, BasicDownloads) {
+IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest,
+                       MAYBE_BasicDownloads) {
   AddAllUsers();
   // Sanity check that normal operations work in multi-profile.
   set_test_case_name("keyboardCopyDownloads");
   StartTest();
 }
 
-IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest, PRE_BasicDrive) {
+// Flaky crashes in ash::tray::MultiProfileMediaTrayView.
+// https://crbug.com/842442
+#if defined(MEMORY_SANITIZER) || defined(ADDRESS_SANITIZER) || \
+    defined(LEAK_SANITIZER)
+#define MAYBE_PRE_BasicDrive DISABLED_PRE_BasicDrive
+#define MAYBE_BasicDrive DISABLED_BasicDrive
+#else
+#define MAYBE_PRE_BasicDrive PRE_BasicDrive
+#define MAYBE_BasicDrive BasicDrive
+#endif
+IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest,
+                       MAYBE_PRE_BasicDrive) {
   AddAllUsers();
 }
 
-IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest, BasicDrive) {
+IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest, MAYBE_BasicDrive) {
   AddAllUsers();
   // Sanity check that normal operations work in multi-profile.
   set_test_case_name("keyboardCopyDrive");