Remove StyleInvalidator machinery.

sky/engine/core/dom/StyleEngine.cpp

Index: sky/engine/core/dom/StyleEngine.cpp
diff --git a/sky/engine/core/dom/StyleEngine.cpp b/sky/engine/core/dom/StyleEngine.cpp
index 72bde653d1e69e1db415d5527f6241a87faa33e6..659d823590b990f9de7e448a8f7ec8e00110e9b8 100644
--- a/sky/engine/core/dom/StyleEngine.cpp
+++ b/sky/engine/core/dom/StyleEngine.cpp
@@ -352,9 +352,6 @@ void StyleEngine::clearResolver()
     for (ScopedStyleResolverSet::iterator it = m_scopedStyleResolvers.begin(); it != m_scopedStyleResolvers.end(); ++it)
         const_cast<TreeScope&>((*it)->treeScope()).clearScopedStyleResolver();
     m_scopedStyleResolvers.clear();
-
-    if (m_resolver)
-        document().updateStyleInvalidationIfNeeded();
     m_resolver.clear();
 }