Moved applyRuleSetChanges functions to StyleEngine.

third_party/WebKit/Source/core/dom/StyleEngine.h

Index: third_party/WebKit/Source/core/dom/StyleEngine.h
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.h b/third_party/WebKit/Source/core/dom/StyleEngine.h
index d0912d9415324e37a90905c6f6832dfc61787c11..c3f47d518bb2967c88dc0a975c55b7c6441f08d5 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.h
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.h
@@ -33,6 +33,7 @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/TraceWrapperMember.h"
 #include "core/CoreExport.h"
+#include "core/css/ActiveStyleSheets.h"
 #include "core/css/CSSFontSelectorClient.h"
 #include "core/css/CSSGlobalRuleSet.h"
 #include "core/css/invalidation/StyleInvalidator.h"
@@ -247,6 +248,10 @@ class CORE_EXPORT StyleEngine final
 
   PassRefPtr<ComputedStyle> findSharedStyle(const ElementResolveContext&);
 
+  void applyRuleSetChanges(TreeScope&,
+                           const ActiveStyleSheetVector& oldStyleSheets,
+                           const ActiveStyleSheetVector& newStyleSheets);
+
   DECLARE_VIRTUAL_TRACE();
   DECLARE_TRACE_WRAPPERS();