Disable failing tests on Mac 10.10 and 10.11 after swarming.

extensions/browser/api/app_window/app_window_apitest.cc

Index: extensions/browser/api/app_window/app_window_apitest.cc
diff --git a/extensions/browser/api/app_window/app_window_apitest.cc b/extensions/browser/api/app_window/app_window_apitest.cc
index 857c40343291343e490595903544b8ea9b300cfe..2bc34b1b9c923fa81b7bf462948b6d00c7088a2b 100644
--- a/extensions/browser/api/app_window/app_window_apitest.cc
+++ b/extensions/browser/api/app_window/app_window_apitest.cc
@@ -24,6 +24,10 @@
 #include "ui/base/win/shell.h"
 #endif
 
+#if defined(OS_MACOSX)
+#include "base/mac/mac_util.h"
+#endif
+
 namespace extensions {
 
 namespace {
@@ -87,6 +91,10 @@ IN_PROC_BROWSER_TEST_F(ExperimentalPlatformAppBrowserTest, WindowsApiSetIcon) {
 #if defined(TOOLKIT_VIEWS) && !(defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_AURA))
 
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, WindowsApiProperties) {
+#if defined(OS_MACOSX)
+  if (base::mac::IsOS10_10())
+    return;  // Fails when swarmed. http://crbug.com/660582
+#endif
   EXPECT_TRUE(
       RunExtensionTest("platform_apps/windows_api_properties")) << message_;
 }