Expose WebCrypto's algorithm normalization.

Source/web/WebScriptBindings.cpp

Index: Source/web/WebScriptBindings.cpp
diff --git a/Source/web/WebScriptBindings.cpp b/Source/web/WebScriptBindings.cpp
index 4377db6edd6a1f95dea7034983fa8f1a24557854..1452ed22126fa6b707be7a6ae39cbc0a49ced4f3 100644
--- a/Source/web/WebScriptBindings.cpp
+++ b/Source/web/WebScriptBindings.cpp
@@ -31,8 +31,14 @@
 #include "config.h"
 #include "public/web/WebScriptBindings.h"
 
+#include "bindings/v8/Dictionary.h"
 #include "bindings/v8/V8Binding.h"
+#include "modules/crypto/CryptoResultImpl.h"
+#include "modules/crypto/NormalizeAlgorithm.h"
+#include "platform/CryptoResult.h"
+#include "public/platform/WebCryptoAlgorithm.h"
 #include "public/platform/WebString.h"
+#include <v8.h>
 
 using namespace WebCore;
 
@@ -48,4 +54,20 @@ WebString WebScriptBindings::toWebString(v8::Handle<v8::String> v8String)
     return v8StringToWebCoreString<String>(v8String, Externalize);
 }
 
+WebCryptoAlgorithm WebScriptBindings::normalizeCryptoAlgorithm(v8::Handle<v8::Object> algorithmObject, AlgorithmOperation operation, int* exceptionCode, WebString* errorDetails, v8::Isolate* isolate)
+{
+    Dictionary algorithmDictionary = Dictionary(algorithmObject, isolate);
+    if (!algorithmDictionary.isUndefinedOrNull() && !algorithmDictionary.isObject())
+        return WebCryptoAlgorithm();
+    WebCryptoAlgorithm algorithm;
+    AlgorithmError error;
+    if (!normalizeAlgorithm(algorithmDictionary, operation, algorithm, &error)) {
+        *exceptionCode = webCryptoErrorToExceptionCode(error.errorType);
+        *errorDetails = error.errorDetails;
+        return WebCryptoAlgorithm();
+    }
+
+    return algorithm;
+}
+
 } // namespace blink