Remove the unnecessary DCHECK(..), which is guranteed to be true by the previous line

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

Index: third_party/WebKit/Source/core/dom/StyleEngine.cpp
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.cpp b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
index 1e36ebbccb8fbe5b045ca04e1592ab466fbd15de..f601b79e16e7396e7a76ba240211c21fa8863a9b 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
@@ -192,7 +192,6 @@ void StyleEngine::addStyleSheetCandidateNode(Node* node)
         return;
 
     TreeScope& treeScope = isStyleElement(*node) ? node->treeScope() : *m_document;
-    DCHECK(isStyleElement(*node) || treeScope == m_document);
     DCHECK(!isXSLStyleSheet(*node));
     TreeScopeStyleSheetCollection* collection = ensureStyleSheetCollectionFor(treeScope);
     DCHECK(collection);