New paint invalidation using paint property tree walk

third_party/WebKit/Source/core/dom/DocumentLifecycle.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 179 matching lines @@
         break;
     case InCompositingUpdate:
         return nextState == CompositingClean;
     case CompositingClean:
         if (nextState == InStyleRecalc)
             return true;
         if (nextState == InPreLayout)
             return true;
         if (nextState == InCompositingUpdate)
             return true;
-        if (nextState == InPaintInvalidation)
+        if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled()) {
+            if (nextState == InUpdatePaintProperties)
+                return true;
+        } else if (nextState == InPaintInvalidation) {
             return true;
+        }
         break;
     case InPaintInvalidation:
+        ASSERT(!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled());
         return nextState == PaintInvalidationClean;
     case PaintInvalidationClean:
+        ASSERT(!RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled());
         if (nextState == InStyleRecalc)
             return true;
         if (nextState == InPreLayout)
             return true;
         if (nextState == InCompositingUpdate)
             return true;
         if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
             if (nextState == InUpdatePaintProperties)
                 return true;
         } else if (nextState == InPaint) {
             return true;
         }
         break;
     case InUpdatePaintProperties:
-        if (nextState == UpdatePaintPropertiesClean && RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+        if (nextState == UpdatePaintPropertiesClean && (RuntimeEnabledFeatures::slimmingPaintV2Enabled() || RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled()))
             return true;
         break;
     case UpdatePaintPropertiesClean:
-        if (nextState == InPaint && RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+        if (nextState == InPaint && (RuntimeEnabledFeatures::slimmingPaintV2Enabled() || RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled()))
             return true;
         break;
     case InPaint:
         if (nextState == PaintClean)
             return true;
         break;
     case PaintClean:
         if (nextState == InStyleRecalc)
             return true;
         if (nextState == InPreLayout)
@@ skipping 81 matching lines @@
         DEBUG_STRING_CASE(Stopped);
         DEBUG_STRING_CASE(Disposed);
     }
 
     ASSERT_NOT_REACHED();
     return "Unknown";
 }
 #endif
 
 } // namespace blink