Add --disable-slimming-paint-invalidation

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 40c49cb5d7f12af8d3dfee7ee80976e55cbc7fbc..e3d57b539bfe05471d363f5ad74d9924ac742154 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -464,10 +464,12 @@ const char kEnableSkiaBenchmarking[]        = "enable-skia-benchmarking";
 // Enables slimming paint phase 2: http://www.chromium.org/blink/slimming-paint
 const char kEnableSlimmingPaintV2[]         = "enable-slimming-paint-v2";
 
-// Enables paint invalidation based on slimming paint but without the full
-// slimming paint v2 compositing code. See: https://goo.gl/eQczQW
+// Enables or disables paint invalidation based on slimming paint but without
+// the full slimming paint v2 compositing code. See: https://goo.gl/eQczQW
 const char kEnableSlimmingPaintInvalidation[] =
     "enable-slimming-paint-invalidation";
+const char kDisableSlimmingPaintInvalidation[] =
+    "disable-slimming-paint-invalidation";
 
 // On platforms that support it, enables smooth scroll animation.
 const char kEnableSmoothScrolling[]         = "enable-smooth-scrolling";