Avoid always style recalc when removing stylesheets.

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 99476e63ad44f092dfbb40b83574c243b72d7659..043688bf645a1d8ff01ec973fbc5992ebcea6264 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -478,9 +478,9 @@ public:
 
     // FIXME: Switch all callers of styleResolverChanged to these or better ones and then make them
     // do something smarter.
-    void removedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred) { styleResolverChanged(when); }
+    void removedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred, StyleResolverUpdateMode = FullStyleUpdate);
     void addedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred) { styleResolverChanged(when); }
-    void modifiedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred) { styleResolverChanged(when); }
+    void modifiedStyleSheet(StyleSheet*, RecalcStyleTime when = RecalcStyleDeferred, StyleResolverUpdateMode = FullStyleUpdate);
     void changedSelectorWatch() { styleResolverChanged(RecalcStyleDeferred); }
 
     void didAccessStyleResolver() { ++m_styleResolverAccessCount; }