Disable TabCaptureApiTest.MaxOffscreenTabs on Mac on ASAN due to flakiness.

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 148 matching lines @@
             TabCaptureCaptureOffscreenTabFunction::DetermineInitialSize(
                 options));
 }
 
 // Tests API behaviors, including info queries, and constraints violations.
 IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, ApiTests) {
   AddExtensionToCommandLineWhitelist();
   ASSERT_TRUE(RunExtensionSubtest("tab_capture", "api_tests.html")) << message_;
 }
 
+#if defined(OS_MACOSX) && defined(ADDRESS_SANITIZER)
+// Flaky on ASAN on Mac. See https://crbug.com/674497.
+#define MAYBE_MaxOffscreenTabs DISABLED_MaxOffscreenTabs
+#else
+#define MAYBE_MaxOffscreenTabs MaxOffscreenTabs
+#endif
 // Tests that there is a maximum limitation to the number of simultaneous
 // off-screen tabs.
-IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, MaxOffscreenTabs) {
+IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, MAYBE_MaxOffscreenTabs) {
   AddExtensionToCommandLineWhitelist();
   ASSERT_TRUE(RunExtensionSubtest("tab_capture", "max_offscreen_tabs.html"))
       << message_;
 }
 
 // Tests that tab capture video frames can be received in a VIDEO element.
 IN_PROC_BROWSER_TEST_F(TabCaptureApiPixelTest, EndToEndWithoutRemoting) {
   if (IsTooIntensiveForThisPlatform()) {
     LOG(WARNING) << "Skipping this CPU-intensive test on this platform/build.";
     return;
@@ skipping 281 matching lines @@
       EXPECT_EQ(TabAlertState::TAB_CAPTURING, observer.last_alert_state());
       return;
     }
     content::RunMessageLoop();
   }
 }
 
 }  // namespace
 
 }  // namespace extensions