Expose WebCrypto's algorithm normalization.

public/web/WebScriptBindings.h

Index: public/web/WebScriptBindings.h
diff --git a/public/web/WebScriptBindings.h b/public/web/WebScriptBindings.h
index ef953b659e6aec6d284dcd47e659781e20ff94b1..64764fffca72a81eaa1685f9dd670e6720323a2d 100644
--- a/public/web/WebScriptBindings.h
+++ b/public/web/WebScriptBindings.h
@@ -32,9 +32,11 @@
 #define WebScriptBindings_h
 
 #include "../platform/WebCommon.h"
+#include "../platform/WebCryptoAlgorithmOperation.h"
 
 namespace v8 {
 class Isolate;
+class Object;
 class String;
 template <class T> class Handle;
 template <class T> class Local;
@@ -43,6 +45,7 @@ template <class T> class Local;
 namespace blink {
 
 class WebString;
+class WebCryptoAlgorithm;
 
 class WebScriptBindings {
 public:
@@ -52,6 +55,16 @@ public:
 
     // You can use v8::Value::toString() to get a v8::String, but remember to wrap that in a v8::TryCatch.
     BLINK_EXPORT static WebString toWebString(v8::Handle<v8::String>);
+
+    // Converts a javascript Dictionary to a WebCryptoAlgorithm object.
+    //
+    // This corresponds with "normalizing" [1] the algorithm, and then validating
+    // the expected parameters for the algorithm/operation combination.
+    //
+    // On failure returns an null WebCryptoAlgorithm, sets the int to the ExceptionCode and the WebString to a (non-localized) debug string.
+    //
+    // [1] http://www.w3.org/TR/WebCryptoAPI/#algorithm-normalizing-rules
+    BLINK_EXPORT static WebCryptoAlgorithm normalizeCryptoAlgorithm(v8::Handle<v8::Object>, AlgorithmOperation, int*, WebString*, v8::Isolate*);
 };
 
 } // namespace blink