Implement ScriptPromise and ScriptFunction

Source/bindings/v8/ScriptPromise.h

Index: Source/bindings/v8/ScriptPromise.h
diff --git a/Source/core/testing/GCObservation.h b/Source/bindings/v8/ScriptPromise.h
similarity index 63%
copy from Source/core/testing/GCObservation.h
copy to Source/bindings/v8/ScriptPromise.h
index 469656acc669dba1a3a051e6460eab4243ddff47..c8c246d1ab671f2f4e9b6db798548326d4c91510 100644
--- a/Source/core/testing/GCObservation.h
+++ b/Source/bindings/v8/ScriptPromise.h
@@ -28,35 +28,43 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef GCObservation_h
-#define GCObservation_h
+#ifndef ScriptPromise_h
+#define ScriptPromise_h
 
 #include "bindings/v8/ScopedPersistent.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
+#include "bindings/v8/ScriptFunction.h"
+#include "bindings/v8/V8ScriptRunner.h"
 #include <v8.h>
 
 namespace WebCore {
 
-class GCObservation : public RefCounted<GCObservation> {
+class ScriptPromise {
 public:
-    static PassRefPtr<GCObservation> create(v8::Handle<v8::Value> observedValue) { return adoptRef(new GCObservation(observedValue)); }
-    ~GCObservation() { }
+    explicit ScriptPromise(ScriptValue promise)
+        : m_promise(promise)
+    {
+        ASSERT(!m_promise.hasNoValue());
+    }
 
-    // Caution: It is only feasible to determine whether an object was
-    // "near death"; it may have been kept alive through a weak
-    // handle. After reaching near-death, having been collected is the
-    // common case.
-    bool wasCollected() const { return m_collected; }
-    void setWasCollected();
+    bool then(v8::Handle<v8::Function> function, ScriptValue& result)
+    {
+        if (!m_promise.isObject())
+            return false;
+        v8::Handle<v8::Object> promise = m_promise.v8Value().As<v8::Object>();
+        v8::Handle<v8::Value> then = promise->Get(v8::String::NewSymbol("then"));
+        if (then.IsEmpty() || !then->IsFunction())
+            return false;
 
-private:
-    explicit GCObservation(v8::Handle<v8::Value>);
+        v8::Handle<v8::Value> argv[] = { function };
+        result = V8ScriptRunner::callFunction(then.As<v8::Function>(), getScriptExecutionContext(), promise, WTF_ARRAY_LENGTH(argv), argv);
+        return true;
+    }
 
-    ScopedPersistent<v8::Value> m_observed;
-    bool m_collected;
+private:
+    ScriptValue m_promise;
 };
 
-}
+} // namespace WebCore
+
 
-#endif // GCObservation_h
+#endif // ScriptPromise_h