Disable flaky test ExtensionCrashRecoveryTest.ReloadIndependentlyChangeTabs.

TBR=fhorschig@chromium.org,rdevlin.cronin@chromium.org

Bug: 846172
Change-Id: Ie06f83131d4f60b9c3465a8d1b77bcfce45ff19f
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/1070955Reviewed-by: Yuta Kitamura <yutak@chromium.org>
Reviewed-by: Friedrich Horschig <fhorschig@chromium.org>
Commit-Queue: Yuta Kitamura <yutak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561415}

chrome/browser/extensions/extension_crash_recovery_browsertest.cc

@@ -198,6 +198,15 @@ IN_PROC_BROWSER_TEST_F(ExtensionCrashRecoveryTest, ReloadIndependently) {
   ASSERT_EQ(0U, CountNotifications());
 }
 
+// Flaky. crbug.com/846172
+
+#if defined(OS_LINUX)
+#define MAYBE_ReloadIndependentlyChangeTabs \
+  DISABLED_ReloadIndependentlyChangeTabs
+#else
+#define MAYBE_ReloadIndependentlyChangeTabs ReloadIndependentlyChangeTabs
+#endif
+
 IN_PROC_BROWSER_TEST_F(ExtensionCrashRecoveryTest,
                        ReloadIndependentlyChangeTabs) {
   const size_t count_before = GetEnabledExtensionCount();