Remove Navigation Transitions from Blink.

Source/core/dom/StyleEngine.cpp

Index: Source/core/dom/StyleEngine.cpp
diff --git a/Source/core/dom/StyleEngine.cpp b/Source/core/dom/StyleEngine.cpp
index c61510891fe4b1b29b9e3a6449fa17e210be5819..ac540ebdadbc4d517b723ac45d3f74ba5a61df43 100644
--- a/Source/core/dom/StyleEngine.cpp
+++ b/Source/core/dom/StyleEngine.cpp
@@ -319,12 +319,6 @@ void StyleEngine::modifiedStyleSheetCandidateNode(Node* node)
     markTreeScopeDirty(treeScope);
 }
 
-void StyleEngine::setExitTransitionStylesheetsEnabled(bool enabled)
-{
-    TreeScopeStyleSheetCollection* collection = ensureStyleSheetCollectionFor(*m_document);
-    collection->setExitTransitionStyleshetsEnabled(enabled);
-}
-
 bool StyleEngine::shouldUpdateDocumentStyleSheetCollection(StyleResolverUpdateMode updateMode) const
 {
     return m_documentScopeDirty || updateMode == FullStyleUpdate;