Have Document::timing() / Document::contextFeatures() return a reference

Source/core/dom/ContextFeatures.cpp

Index: Source/core/dom/ContextFeatures.cpp
diff --git a/Source/core/dom/ContextFeatures.cpp b/Source/core/dom/ContextFeatures.cpp
index 547e44490fed86e60450cfd79c849cb22590ebcb..377c50e69cd79fe232d5d78ff787dffa94afaca7 100644
--- a/Source/core/dom/ContextFeatures.cpp
+++ b/Source/core/dom/ContextFeatures.cpp
@@ -54,21 +54,21 @@ bool ContextFeatures::dialogElementEnabled(Document* document)
 {
     if (!document)
         return RuntimeEnabledFeatures::dialogElementEnabled();
-    return document->contextFeatures()->isEnabled(document, DialogElement, RuntimeEnabledFeatures::dialogElementEnabled());
+    return document->contextFeatures().isEnabled(document, DialogElement, RuntimeEnabledFeatures::dialogElementEnabled());
 }
 
 bool ContextFeatures::styleScopedEnabled(Document* document)
 {
     if (!document)
         return RuntimeEnabledFeatures::styleScopedEnabled();
-    return document->contextFeatures()->isEnabled(document, StyleScoped, RuntimeEnabledFeatures::styleScopedEnabled());
+    return document->contextFeatures().isEnabled(document, StyleScoped, RuntimeEnabledFeatures::styleScopedEnabled());
 }
 
 bool ContextFeatures::pagePopupEnabled(Document* document)
 {
     if (!document)
         return false;
-    return document->contextFeatures()->isEnabled(document, PagePopup, false);
+    return document->contextFeatures().isEnabled(document, PagePopup, false);
 }
 
 bool ContextFeatures::mutationEventsEnabled(Document* document)
@@ -76,12 +76,12 @@ bool ContextFeatures::mutationEventsEnabled(Document* document)
     ASSERT(document);
     if (!document)
         return true;
-    return document->contextFeatures()->isEnabled(document, MutationEvents, true);
+    return document->contextFeatures().isEnabled(document, MutationEvents, true);
 }
 
 bool ContextFeatures::pushStateEnabled(Document* document)
 {
-    return document->contextFeatures()->isEnabled(document, PushState, true);
+    return document->contextFeatures().isEnabled(document, PushState, true);
 }
 
 void provideContextFeaturesTo(Page& page, ContextFeaturesClient* client)
@@ -94,7 +94,7 @@ void provideContextFeaturesToDocumentFrom(Document& document, Page& page)
     ContextFeatures* provided = static_cast<ContextFeatures*>(RefCountedSupplement<Page, ContextFeatures>::from(page, ContextFeatures::supplementName()));
     if (!provided)
         return;
-    document.setContextFeatures(provided);
+    document.setContextFeatures(*provided);
 }
 
 }