Disable failing tests on Mac 10.10 and 10.11 after swarming.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm

Index: chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
index 115fefb73791dfd66e881d10913e2a745554897a..72b15bc2d24f0bebe3f0a7f34d50301df4326739 100644
--- a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
+++ b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
@@ -276,6 +276,8 @@ IN_PROC_BROWSER_TEST_P(NativeAppWindowCocoaBrowserTest, Fullscreen) {
 
 // Test Minimize, Restore combinations with their native equivalents.
 IN_PROC_BROWSER_TEST_P(NativeAppWindowCocoaBrowserTest, Minimize) {
+  if (base::mac::IsOS10_10())
+    return;  // Fails when swarmed. http://crbug.com/660582
   SetUpAppWithWindows(1);
   AppWindow* app_window = GetFirstAppWindow();
   extensions::NativeAppWindow* window = app_window->GetBaseWindow();
@@ -401,6 +403,8 @@ IN_PROC_BROWSER_TEST_P(NativeAppWindowCocoaBrowserTest, MaximizeConstrained) {
 
 // Test Minimize, Maximize, Restore combinations with their native equivalents.
 IN_PROC_BROWSER_TEST_P(NativeAppWindowCocoaBrowserTest, MinimizeMaximize) {
+  if (base::mac::IsOS10_10())
+    return;  // Fails when swarmed. http://crbug.com/660582
   SetUpAppWithWindows(1);
   AppWindow* app_window = GetFirstAppWindow();
   extensions::NativeAppWindow* window = app_window->GetBaseWindow();