WebCrypto: Add SHA-1 support to crypto.subtle.digest().

Source/modules/crypto/CryptoOperation.h

Index: Source/modules/crypto/CryptoOperation.h
diff --git a/Source/modules/crypto/CryptoOperation.h b/Source/modules/crypto/CryptoOperation.h
index 001747eb26e92fdea2ca96ba41e45434ac76e314..b26974dd9d66ca0e49bb83757d9af6833406e7f9 100644
--- a/Source/modules/crypto/CryptoOperation.h
+++ b/Source/modules/crypto/CryptoOperation.h
@@ -31,8 +31,10 @@
 #ifndef CryptoOperation_h
 #define CryptoOperation_h
 
+#include "bindings/v8/ScriptObject.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "modules/crypto/Algorithm.h"
+#include "public/platform/WebCrypto.h"
 #include "public/platform/WebCryptoAlgorithm.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
@@ -40,19 +42,59 @@
 
 namespace WebCore {
 
+class ScriptPromiseResolver;
+
 typedef int ExceptionCode;
 
 class CryptoOperation : public ScriptWrappable, public RefCounted<CryptoOperation> {
 public:
-    static PassRefPtr<CryptoOperation> create(const WebKit::WebCryptoAlgorithm& algorithm) { return adoptRef(new CryptoOperation(algorithm)); }
+    ~CryptoOperation();
+    static PassRefPtr<CryptoOperation> create(const WebKit::WebCryptoAlgorithm&, WebKit::WebCryptoOperation*);
+
+    CryptoOperation* process(ArrayBuffer* data);
+    CryptoOperation* process(ArrayBufferView* data);
+
+    ScriptObject finish();
+    ScriptObject abort();
 
     Algorithm* algorithm();
 
 private:
-    explicit CryptoOperation(const WebKit::WebCryptoAlgorithm&);
+    class Result;
+    friend class Result;
+
+    enum State {
+        // Accepting calls to process().
+        Processing,
+
+        // finish() has been called, but the Promise has not been resolved yet.
+        Finishing,
+
+        // The operation either:
+        //  - completed successfully
+        //  - failed
+        //  - was aborted
+        Done,
+    };
+
+    CryptoOperation(const WebKit::WebCryptoAlgorithm&, WebKit::WebCryptoOperation*);
+
+    void process(const unsigned char*, size_t);
+
+    // Aborts and clears m_impl. If the operation has already comleted then
+    // returns false.
+    bool abortImpl();
+
+    ScriptPromiseResolver* promiseResolver();
 
     WebKit::WebCryptoAlgorithm m_algorithm;
+    WebKit::WebCryptoOperation* m_impl;
     RefPtr<Algorithm> m_algorithmNode;
+    State m_state;
+
+    RefPtr<ScriptPromiseResolver> m_promiseResolver;
+
+    OwnPtr<Result> m_result;
 };
 
 } // namespace WebCore