Remove StyleMatchedPropertiesCache runtime flag (status=stable)

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
index 701a69d21356084fa8e36e23d9a353dcd8aa1989..96a165a18e463fa8f0b9fdce47b0b5299946c119 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
@@ -1574,8 +1574,7 @@ void StyleResolver::applyMatchedProperties(StyleResolverState& state,
                                 1);
 
   unsigned cacheHash =
-      RuntimeEnabledFeatures::styleMatchedPropertiesCacheEnabled() &&
-              matchResult.isCacheable()
+      matchResult.isCacheable()
           ? computeMatchedPropertiesHash(matchResult.matchedProperties().data(),
                                          matchResult.matchedProperties().size())
           : 0;
@@ -1719,7 +1718,6 @@ void StyleResolver::applyMatchedProperties(StyleResolverState& state,
 
   if (!cachedMatchedProperties && cacheHash &&
       MatchedPropertiesCache::isCacheable(state)) {
-    DCHECK(RuntimeEnabledFeatures::styleMatchedPropertiesCacheEnabled());
     INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(),
                                   matchedPropertyCacheAdded, 1);
     m_matchedPropertiesCache.add(*state.style(), *state.parentStyle(),