WebCrypto: Add crypto.subtle.verify() to the platform interfaces.

Source/modules/crypto/SubtleCrypto.h

Index: Source/modules/crypto/SubtleCrypto.h
diff --git a/Source/modules/crypto/SubtleCrypto.h b/Source/modules/crypto/SubtleCrypto.h
index 9964bdae774e429fc7f31bc8f1d35e4b14fd7e2a..fc4005efbd17bbed6625ddca1c753ef8e6fdf81d 100644
--- a/Source/modules/crypto/SubtleCrypto.h
+++ b/Source/modules/crypto/SubtleCrypto.h
@@ -52,7 +52,7 @@ public:
     PassRefPtr<CryptoOperation> decrypt(const Dictionary&, Key*, ExceptionState&);
     PassRefPtr<CryptoOperation> sign(const Dictionary&, Key*, ExceptionState&);
     // Note that this is not named "verify" because when compiling on Mac that expands to a macro and breaks.
-    PassRefPtr<CryptoOperation> verifySignature(const Dictionary&, Key*, ExceptionState&);
+    PassRefPtr<CryptoOperation> verifySignature(const Dictionary&, Key*, ArrayBufferView* signature, ExceptionState&);
     PassRefPtr<CryptoOperation> digest(const Dictionary&, ExceptionState&);
 
     ScriptObject importKey(const String&, ArrayBufferView*, const Dictionary&, bool extractable, const Vector<String>& keyUsages, ExceptionState&);