Introduce LiteralSet

Source/wtf/LiteralSet.h

Index: Source/wtf/LiteralSet.h
diff --git a/Source/core/platform/Task.h b/Source/wtf/LiteralSet.h
similarity index 68%
copy from Source/core/platform/Task.h
copy to Source/wtf/LiteralSet.h
index fe0270a8ec78113c954aa5a1fd5d2758d23a89eb..3dd52b40e582f65237c212de064cdb54e03dfe92 100644
--- a/Source/core/platform/Task.h
+++ b/Source/wtf/LiteralSet.h
@@ -28,30 +28,47 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef Task_h
-#define Task_h
+#ifndef WTF_LiteralSet_h
+#define WTF_LiteralSet_h
 
-#include "wtf/Functional.h"
-#include <public/WebThread.h>
+#include "wtf/NonCopyingSort.h"
 
-namespace WebCore {
+#include <algorithm>
 
-class Task : public WebKit::WebThread::Task {
+namespace WTF {
+
+template<typename T, typename Comparer>
+class LiteralSet {
 public:
-    explicit Task(const Closure& closure)
-        : m_closure(closure)
+    LiteralSet()
+        : m_values(0)
+        , m_size(0)
+    {
+    }
+
+    void init(T values[], size_t size)
     {
+        ASSERT(!isInitialized());
+        m_values = values;
+        m_size = size;
+        nonCopyingSort(m_values, m_values + m_size, Comparer::lessThan);
     }
 
-    virtual void run() OVERRIDE
+    bool contains(const T& value)
     {
-        m_closure();
+        ASSERT(isInitialized());
+        return std::binary_search(m_values, m_values + m_size, value, Comparer::lessThan);
     }
 
+    bool isInitialized() { return !m_size; }
+
 private:
-    Closure m_closure;
+    T* m_values;
+    size_t m_size;
 };
 
-} // namespace WebCore
+} // namespace WTF
+
+using WTF::LiteralSet;
 
-#endif // Task_h
+#endif