Fix template angle bracket syntax in dom

Source/core/dom/MutationObserver.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 189 matching lines @@
     activateObserver(this);
     InspectorInstrumentation::didEnqueueMutationRecord(m_callback->executionContext(), this);
 }
 
 void MutationObserver::setHasTransientRegistration()
 {
     ASSERT(isMainThread());
     activateObserver(this);
 }
 
-WillBeHeapHashSet<RawPtrWillBeMember<Node> > MutationObserver::getObservedNodes() const
+WillBeHeapHashSet<RawPtrWillBeMember<Node>> MutationObserver::getObservedNodes() const
 {
-    WillBeHeapHashSet<RawPtrWillBeMember<Node> > observedNodes;
+    WillBeHeapHashSet<RawPtrWillBeMember<Node>> observedNodes;
     for (const auto& registration : m_registrations)
         registration->addRegistrationNodesToSet(observedNodes);
     return observedNodes;
 }
 
 bool MutationObserver::shouldBeSuspended() const
 {
     return m_callback->executionContext() && m_callback->executionContext()->activeDOMObjectsAreSuspended();
 }
 
@@ skipping 57 matching lines @@
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_callback);
     visitor->trace(m_records);
     visitor->trace(m_registrations);
     visitor->trace(m_callback);
 #endif
 }
 
 } // namespace blink