Remove buffering from PerformanceLongTaskTiming as it's not in the spec.

third_party/WebKit/Source/core/timing/PerformanceObserver.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PerformanceObserver_h
 #define PerformanceObserver_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/timing/PerformanceEntry.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class ExceptionState;
 class PerformanceBase;
 class PerformanceObserver;
 class PerformanceObserverCallback;
 class PerformanceObserverInit;
 class ScriptState;
 
 using PerformanceEntryVector = HeapVector<Member<PerformanceEntry>>;
 
 class CORE_EXPORT PerformanceObserver final
     : public GarbageCollectedFinalized<PerformanceObserver>,
       public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
   friend class PerformanceBase;
+  friend class PerformanceBaseTest;
   friend class PerformanceObserverTest;
 
  public:
   static PerformanceObserver* create(ScriptState*,
                                      PerformanceBase*,
                                      PerformanceObserverCallback*);
   static void resumeSuspendedObservers();
 
   void observe(const PerformanceObserverInit&, ExceptionState&);
   void disconnect();
@@ skipping 13 matching lines @@
   Member<PerformanceObserverCallback> m_callback;
   WeakMember<PerformanceBase> m_performance;
   PerformanceEntryVector m_performanceEntries;
   PerformanceEntryTypeMask m_filterOptions;
   bool m_isRegistered;
 };
 
 }  // namespace blink
 
 #endif  // PerformanceObserver_h