Introduce KeepAliveWhilePending to ScriptPromiseResolverWithContext.

Source/modules/crypto/SubtleCrypto.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SubtleCrypto_h
 #define SubtleCrypto_h
 
 #include "bindings/v8/ScriptPromise.h"
 #include "bindings/v8/ScriptWrappable.h"
+#include "modules/crypto/CrossThreadCryptoResult.h"
 #include "platform/heap/Handle.h"
+#include "public/platform/WebCryptoAlgorithm.h"
 #include "wtf/ArrayPiece.h"
 #include "wtf/Forward.h"
-#include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class Dictionary;
 class Key;
 
 class SubtleCrypto : public GarbageCollectedFinalized<SubtleCrypto>, public ScriptWrappable {
 public:
     static SubtleCrypto* create()
     {
         return new SubtleCrypto();
     }
+    virtual ~SubtleCrypto();
 
     ScriptPromise encrypt(ScriptState*, const Dictionary&, Key*, const ArrayPiece&);
     ScriptPromise decrypt(ScriptState*, const Dictionary&, Key*, const ArrayPiece&);
     ScriptPromise sign(ScriptState*, const Dictionary&, Key*, const ArrayPiece&);
     // Note that this is not named "verify" because when compiling on Mac that expands to a macro and breaks.
     ScriptPromise verifySignature(ScriptState*, const Dictionary&, Key*, const ArrayPiece& signature, const ArrayPiece& data);
     ScriptPromise digest(ScriptState*, const Dictionary&, const ArrayPiece& data);
 
     ScriptPromise generateKey(ScriptState*, const Dictionary&, bool extractable, const Vector<String>& keyUsages);
     ScriptPromise importKey(ScriptState*, const String&, const ArrayPiece&, const Dictionary&, bool extractable, const Vector<String>& keyUsages);
     ScriptPromise exportKey(ScriptState*, const String&, Key*);
 
     ScriptPromise wrapKey(ScriptState*, const String&, Key*, Key*, const Dictionary&);
     ScriptPromise unwrapKey(ScriptState*, const String&, const ArrayPiece&, Key*, const Dictionary&, const Dictionary&, bool, const Vector<String>&);
 
-    void trace(Visitor*) { }
+    void trace(Visitor*);
 
 private:
+    class PendingResult;
     SubtleCrypto();
+
+    ScriptPromise startCryptoOperation(ScriptState*, const Dictionary&, Key*, blink::WebCryptoOperation, const ArrayPiece& signature, const ArrayPiece& dataBuffer);
+    PassRefPtr<CrossThreadCryptoResult<PendingResult> > createCrossThreadCryptoResult(ScriptState*, ScriptPromise*);
+    HeapHashSet<Member<PendingResult> > m_pendingResults;
 };
 
 } // namespace WebCore
 
 #endif