Worker: Avoid sending IPC messages for features already counted

third_party/WebKit/Source/core/workers/WorkerOrWorkletGlobalScope.h

 // Copyright 2016 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 WorkerOrWorkletGlobalScope_h
 #define WorkerOrWorkletGlobalScope_h
 
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/UseCounter.h"
 
@@ skipping 23 matching lines @@
   // WorkerGlobalScope#close() method). If this returns true, the worker is
   // going to be shutdown after the current task execution. Globals that
   // don't support close operation should always return false.
   virtual bool IsClosing() const = 0;
 
   // Should be called before destroying the global scope object. Allows
   // sub-classes to perform any cleanup needed.
   virtual void Dispose() = 0;
 
   // Called from UseCounter to record API use in this execution context.
-  virtual void CountFeature(UseCounter::Feature) = 0;
+  void CountFeature(UseCounter::Feature);
 
   // Called from UseCounter to record deprecated API use in this execution
-  // context. Sub-classes should call addDeprecationMessage() in this function.
-  virtual void CountDeprecation(UseCounter::Feature) = 0;
+  // context.
+  void CountDeprecation(UseCounter::Feature);
 
   // May return nullptr if this global scope is not threaded (i.e.,
   // MainThreadWorkletGlobalScope) or after dispose() is called.
   virtual WorkerThread* GetThread() const = 0;
 
  protected:
-  // Adds a deprecation message to the console.
-  void AddDeprecationMessage(UseCounter::Feature);
+  virtual void ReportFeature(UseCounter::Feature) = 0;
+  virtual void ReportDeprecation(UseCounter::Feature) = 0;
 
  private:
   void RunTask(std::unique_ptr<ExecutionContextTask>, bool is_instrumented);
 
-  BitVector deprecation_warning_bits_;
+  // This is the set of features that this worker has used.
+  BitVector used_features_;
 };
 
 DEFINE_TYPE_CASTS(
     WorkerOrWorkletGlobalScope,
     ExecutionContext,
     context,
     (context->IsWorkerGlobalScope() || context->IsWorkletGlobalScope()),
     (context.IsWorkerGlobalScope() || context.IsWorkletGlobalScope()));
 
 }  // namespace blink
 
 #endif  // WorkerOrWorkletGlobalScope_h