First version of PerformanceObserver

Source/core/inspector/InspectorInstrumentation.idl

 /*
 * Copyright (C) 2013 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 150 matching lines @@
     [AsyncCallTracker, Inline=FastReturn]
     void didClearAllMutationRecords([Keep] ExecutionContext*, MutationObserver*);
 
     [AsyncCallTracker, Inline=FastReturn]
     void willDeliverMutationRecords([Keep] ExecutionContext*, MutationObserver*);
 
     [AsyncCallTracker, Inline=FastReturn]
     void didDeliverMutationRecords(ExecutionContext*);
 
     [AsyncCallTracker, Inline=FastReturn]
+    void didEnqueuePerformanceObserverEntries([Keep] ExecutionContext*, PerformanceObserver*);

[yurys, 2015/08/26 19:17:05]

You don't need all these changes. Use generic methods
InspectorInstrumentation::traceAsync* [1] instead and store asyncOperationId on
PerformanceObserver instance. See for example how it is done in
FileReader.cpp[2]. We only create separate map from domain object to
asyncOperationId when it is impossible to store the operation id on the object
itself (e.g. for performance reason).


[1] 
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[2]
https://code.google.com/p/chromium/codesearch#chromium/src/out/Debug/gen/blin...

[MikeB, 2015/08/27 18:02:49]

Done.

+
+    [AsyncCallTracker, Inline=FastReturn]
+    void didClearAllPerformanceObservations([Keep] ExecutionContext*, PerformanceObserver*);
+
+    [AsyncCallTracker, Inline=FastReturn]
+    void willDeliverPerformanceObservations([Keep] ExecutionContext*, PerformanceObserver*);
+
+    [AsyncCallTracker, Inline=FastReturn]
+    void didDeliverPerformanceObservations(ExecutionContext*);
+
+    [AsyncCallTracker, Inline=FastReturn]
     void didPostExecutionContextTask([Keep] ExecutionContext*, ExecutionContextTask*);
 
     [AsyncCallTracker, Inline=FastReturn]
     void didKillAllExecutionContextTasks([Keep] ExecutionContext*);
 
     [AsyncCallTracker, Inline=FastReturn]
     void willPerformExecutionContextTask([Keep] ExecutionContext*, ExecutionContextTask*);
 
     [AsyncCallTracker, Inline=FastReturn]
     void didPerformExecutionContextTask(ExecutionContext*);
@@ skipping 264 matching lines @@
 interface InspectorOverrides {
     [CSS, Inline=FastReturn]
     bool forcePseudoState([Keep] Element* element, CSSSelector::PseudoType pseudoState);
 
     [Worker, Inline=FastReturn]
     bool shouldPauseDedicatedWorkerOnStart(ExecutionContext* context);
 
     [Resource, Inline=FastReturn]
     bool shouldForceCORSPreflight(Document*);
 }