[WIP] Add WebCore.UseCounter UMA to supercede FeatureObserver

third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp

Index: third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp b/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
index e1aff2aec72b87ffba4af9a81c36b36f0783a39a..1e0aba35177f7198e6d6d2850c90152f4dacbb86 100644
--- a/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
+++ b/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
@@ -74,6 +74,7 @@ WorkerGlobalScope::WorkerGlobalScope(const KURL& url, const String& userAgent, W
     : m_url(url)
     , m_userAgent(userAgent)
     , m_v8CacheOptions(V8CacheOptionsDefault)
+    , m_deprecationWarningBits(UseCounter::NumberOfFeatures)
     , m_scriptController(WorkerOrWorkletScriptController::create(this, thread->isolate()))
     , m_thread(thread)
     , m_workerInspectorController(WorkerInspectorController::create(this))
@@ -342,8 +343,8 @@ void WorkerGlobalScope::countDeprecation(UseCounter::Feature feature) const
     DCHECK(isSharedWorkerGlobalScope() || isServiceWorkerGlobalScope() || isCompositorWorkerGlobalScope());
     // For each deprecated feature, send console message at most once
     // per worker lifecycle.
-    if (!m_deprecationWarningBits.hasRecordedMeasurement(feature)) {
-        m_deprecationWarningBits.recordMeasurement(feature);
+    if (!UseCounter::isMuted() && m_deprecationWarningBits.quickGet(feature)) {
+        m_deprecationWarningBits.quickSet(feature);
         DCHECK(!Deprecation::deprecationMessage(feature).isEmpty());
         DCHECK(getExecutionContext());
         getExecutionContext()->addConsoleMessage(ConsoleMessage::create(DeprecationMessageSource, WarningMessageLevel, Deprecation::deprecationMessage(feature)));