Support UseCounter in dedicated workers.

Source/core/workers/DedicatedWorkerGlobalScope.cpp

Index: Source/core/workers/DedicatedWorkerGlobalScope.cpp
diff --git a/Source/core/workers/DedicatedWorkerGlobalScope.cpp b/Source/core/workers/DedicatedWorkerGlobalScope.cpp
index 357ca79f4e1cafceb28918280d18aed9bac204e2..cf30616813de29cddb3ce78f5ce786a5550588a7 100644
--- a/Source/core/workers/DedicatedWorkerGlobalScope.cpp
+++ b/Source/core/workers/DedicatedWorkerGlobalScope.cpp
@@ -78,11 +78,30 @@ void DedicatedWorkerGlobalScope::importScripts(const Vector<String>& urls, Excep
     thread()->workerObjectProxy().reportPendingActivity(hasPendingActivity());
 }
 
-DedicatedWorkerThread* DedicatedWorkerGlobalScope::thread()
+DedicatedWorkerThread* DedicatedWorkerGlobalScope::thread() const
 {
     return static_cast<DedicatedWorkerThread*>(Base::thread());
 }
 
+class CounterTask : public ExecutionContextTask {

[haraken, 2014/06/19 05:29:01]

CounterTask => UseCounterTask ?

[tkent, 2014/06/19 05:34:09]

Done.

+public:
+    static PassOwnPtr<CounterTask> create(UseCounter::Feature feature) { return adoptPtr(new CounterTask(feature)); }
+
+private:
+    CounterTask(UseCounter::Feature feature) : m_feature(feature) { }

[haraken, 2014/06/19 05:29:01]

Add explicit.

[tkent, 2014/06/19 05:34:09]

Done.

+    virtual void performTask(ExecutionContext* context) OVERRIDE
+    {
+        UseCounter::count(*toDocument(context), m_feature);
+    }
+
+    UseCounter::Feature m_feature;
+};
+
+void DedicatedWorkerGlobalScope::countFeature(UseCounter::Feature feature) const
+{
+    thread()->workerObjectProxy().postTaskToMainExecutionContext(CounterTask::create(feature));
+}
+
 void DedicatedWorkerGlobalScope::trace(Visitor* visitor)
 {
     WorkerGlobalScope::trace(visitor);