Convert performance monitor to the subscription model.

third_party/WebKit/Source/core/timing/Performance.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 16 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef Performance_h
 #define Performance_h
 
 #include "core/CoreExport.h"
 #include "core/frame/DOMWindowProperty.h"
+#include "core/frame/PerformanceMonitor.h"
 #include "core/timing/MemoryInfo.h"
 #include "core/timing/PerformanceBase.h"
 #include "core/timing/PerformanceNavigation.h"
 #include "core/timing/PerformanceTiming.h"
 
 namespace blink {
 
 class ScriptState;
 class ScriptValue;
 
 class CORE_EXPORT Performance final : public PerformanceBase,
-                                      public DOMWindowProperty {
+                                      public DOMWindowProperty,
+                                      public PerformanceMonitor::Client {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(Performance);
   friend class PerformanceTest;
 
  public:
   static Performance* create(LocalFrame* frame) {
     return new Performance(frame);
   }
   ~Performance() override;
 
   ExecutionContext* getExecutionContext() const override;
 
   MemoryInfo* memory();
   PerformanceNavigation* navigation() const;
   PerformanceTiming* timing() const override;
 
   void updateLongTaskInstrumentation() override;
 
   ScriptValue toJSONForBinding(ScriptState*) const;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit Performance(LocalFrame*);
 
   // DOMWindowProperty overrides.
   void frameDestroyed() override;
 
+  static std::pair<String, DOMWindow*> sanitizedAttribution(
+      const HeapHashSet<Member<Frame>>& frames,
+      Frame* observerFrame);
+
+  // PerformanceMonitor::Client implementation.
+  void reportLongTask(double startTime,
+                      double endTime,
+                      const HeapHashSet<Member<Frame>>& contextFrames) override;
+
   mutable Member<PerformanceNavigation> m_navigation;
   mutable Member<PerformanceTiming> m_timing;
 };
 
 }  // namespace blink
 
 #endif  // Performance_h