Fix template angle bracket syntax in dom

Source/core/dom/CSSSelectorWatch.h

Index: Source/core/dom/CSSSelectorWatch.h
diff --git a/Source/core/dom/CSSSelectorWatch.h b/Source/core/dom/CSSSelectorWatch.h
index 42085adb32a8900cfebc8aff11c75cb90be88c99..363c2a06e1438f24ec86f24f04a89b4286847eb8 100644
--- a/Source/core/dom/CSSSelectorWatch.h
+++ b/Source/core/dom/CSSSelectorWatch.h
@@ -50,7 +50,7 @@ public:
     static CSSSelectorWatch& from(Document&);
 
     void watchCSSSelectors(const Vector<String>& selectors);
-    const WillBeHeapVector<RefPtrWillBeMember<StyleRule> >& watchedCallbackSelectors() const { return m_watchedCallbackSelectors; }
+    const WillBeHeapVector<RefPtrWillBeMember<StyleRule>>& watchedCallbackSelectors() const { return m_watchedCallbackSelectors; }
 
     void updateSelectorMatches(const Vector<String>& removedSelectors, const Vector<String>& addedSelectors);
 
@@ -63,7 +63,7 @@ private:
 
     RawPtrWillBeMember<Document> m_document;
 
-    WillBeHeapVector<RefPtrWillBeMember<StyleRule> > m_watchedCallbackSelectors;
+    WillBeHeapVector<RefPtrWillBeMember<StyleRule>> m_watchedCallbackSelectors;
 
     // Maps a CSS selector string with a -webkit-callback property to the number
     // of matching LayoutStyle objects in this document.