Split the CSSParserContext class out of CSSParserMode into its own file.

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 22 matching lines @@
 #define PerformanceBase_h
 
 #include "core/CoreExport.h"
 #include "core/dom/DOMHighResTimeStamp.h"
 #include "core/events/EventTarget.h"
 #include "core/loader/FrameLoaderTypes.h"
 #include "core/timing/PerformanceEntry.h"
 #include "core/timing/PerformanceNavigationTiming.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
+#include "platform/network/ResourceResponse.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class ExceptionState;
 class LocalFrame;
 class PerformanceObserver;
@@ skipping 115 matching lines @@
   PerformanceEntryTypeMask m_observerFilterOptions;
   PerformanceObservers m_observers;
   PerformanceObservers m_activeObservers;
   PerformanceObservers m_suspendedObservers;
   Timer<PerformanceBase> m_deliverObservationsTimer;
 };
 
 }  // namespace blink
 
 #endif  // PerformanceBase_h