Disable SPInvalidation by default

content/public/common/content_features.cc

 // Copyright 2015 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 "build/build_config.h"
 #include "content/public/common/content_features.h"
 
 namespace features {
 
 // All features in alphabetical order.
@@ skipping 183 matching lines @@
 // service_worker_version.h for the details.
 const base::Feature kServiceWorkerNavigationPreload{
     "ServiceWorkerNavigationPreload", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // http://tc39.github.io/ecmascript_sharedmem/shmem.html
 const base::Feature kSharedArrayBuffer{"SharedArrayBuffer",
                                        base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Paint invalidation based on slimming paint. See https://goo.gl/eQczQW
 const base::Feature kSlimmingPaintInvalidation{
-    "SlimmingPaintInvalidation", base::FEATURE_ENABLED_BY_DEFAULT};
+    "SlimmingPaintInvalidation", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Speculatively launches Service Workers on mouse/touch events.
 const base::Feature kSpeculativeLaunchServiceWorker{
     "SpeculativeLaunchServiceWorker", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables implementation of the Cache-Control: stale-while-revalidate directive
 // which permits servers to allow the use of stale resources while revalidation
 // proceeds in the background. See http://crbug.com/348877
 const base::Feature kStaleWhileRevalidate{"StaleWhileRevalidate2",
                                           base::FEATURE_DISABLED_BY_DEFAULT};
@@ skipping 90 matching lines @@
 #endif  // !defined(OS_ANDROID)
 
 #if defined(OS_WIN)
 // Emergency "off switch" for new Windows sandbox security mitigation,
 // sandbox::MITIGATION_EXTENSION_POINT_DISABLE.
 const base::Feature kWinSboxDisableExtensionPoints{
     "WinSboxDisableExtensionPoint", base::FEATURE_ENABLED_BY_DEFAULT};
 #endif
 
 }  // namespace features