Disable failing tests on Mac 10.10 and 10.11 after swarming.

ui/views/widget/native_widget_mac_unittest.mm

Index: ui/views/widget/native_widget_mac_unittest.mm
diff --git a/ui/views/widget/native_widget_mac_unittest.mm b/ui/views/widget/native_widget_mac_unittest.mm
index daa0c0a4b66bb8c7b18ed269054664834f479e20..a1a4c992468b2b637252dfa31c94b4e09e8d2733 100644
--- a/ui/views/widget/native_widget_mac_unittest.mm
+++ b/ui/views/widget/native_widget_mac_unittest.mm
@@ -7,6 +7,7 @@
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/foundation_util.h"
+#include "base/mac/mac_util.h"
 #import "base/mac/scoped_nsautorelease_pool.h"
 #import "base/mac/scoped_nsobject.h"
 #import "base/mac/scoped_objc_class_swizzler.h"
@@ -457,6 +458,8 @@ TEST_F(NativeWidgetMacTest, DISABLED_OrderFrontAfterMiniaturize) {
 // Test minimized states triggered externally, implied visibility and restored
 // bounds whilst minimized.
 TEST_F(NativeWidgetMacTest, MiniaturizeExternally) {
+  if (base::mac::IsOS10_10())
+    return;  // Fails when swarmed. http://crbug.com/660582
   Widget* widget = new Widget;
   Widget::InitParams init_params(Widget::InitParams::TYPE_WINDOW);
   widget->Init(init_params);