PerformanceMonitor: do not maintain a vector of frames in the monitor, single ExecutionContext memb…

third_party/WebKit/Source/core/frame/PerformanceMonitor.h

Index: third_party/WebKit/Source/core/frame/PerformanceMonitor.h
diff --git a/third_party/WebKit/Source/core/frame/PerformanceMonitor.h b/third_party/WebKit/Source/core/frame/PerformanceMonitor.h
index 813ddaed3a049afe86a67df92915ce828622e590..1c705d4de8848263d18b85cab9d47c502d74288b 100644
--- a/third_party/WebKit/Source/core/frame/PerformanceMonitor.h
+++ b/third_party/WebKit/Source/core/frame/PerformanceMonitor.h
@@ -57,10 +57,10 @@ class CORE_EXPORT PerformanceMonitor final
 
   class CORE_EXPORT Client : public GarbageCollectedMixin {
    public:
-    virtual void reportLongTask(
-        double startTime,
-        double endTime,
-        const HeapHashSet<Member<Frame>>& contextFrames){};
+    virtual void reportLongTask(double startTime,
+                                double endTime,
+                                ExecutionContext* taskContext,
+                                bool hasMultipleContexts){};
     virtual void reportLongLayout(double duration){};
     virtual void reportGenericViolation(Violation,
                                         const String& text,
@@ -89,6 +89,7 @@ class CORE_EXPORT PerformanceMonitor final
   // Direct API for core.
   void subscribe(Violation, double threshold, Client*);
   void unsubscribeAll(Client*);
+  void shutdown();
 
   explicit PerformanceMonitor(LocalFrame*);
   ~PerformanceMonitor();
@@ -104,10 +105,10 @@ class CORE_EXPORT PerformanceMonitor final
 
   void updateInstrumentation();
 
-  void innerWillExecuteScript(ExecutionContext*);
-  void didExecuteScript();
-  void innerWillCallFunction(ExecutionContext*);
-  void didCallFunction(v8::Local<v8::Function>);
+  void alwaysWillExecuteScript(ExecutionContext*);
+  void alwaysDidExecuteScript();
+  void alwaysWillCallFunction(ExecutionContext*);
+  void alwaysDidCallFunction(v8::Local<v8::Function>);
   void willUpdateLayout();
   void didUpdateLayout();
   void willRecalculateStyle();
@@ -146,7 +147,8 @@ class CORE_EXPORT PerformanceMonitor final
   double m_thresholds[kAfterLast];
 
   Member<LocalFrame> m_localRoot;
-  HeapHashSet<Member<Frame>> m_frameContexts;
+  Member<ExecutionContext> m_taskExecutionContext;
+  bool m_taskHasMultipleContexts = false;
   using ClientThresholds = HeapHashMap<Member<Client>, double>;
   HeapHashMap<Violation,
               Member<ClientThresholds>,