WebCrypto: Add framework for AlgorithmIdentifier normalization.

Source/modules/crypto/AesCbcParams.cpp

Index: Source/modules/crypto/AesCbcParams.cpp
diff --git a/Source/core/html/ime/Composition.cpp b/Source/modules/crypto/AesCbcParams.cpp
similarity index 80%
copy from Source/core/html/ime/Composition.cpp
copy to Source/modules/crypto/AesCbcParams.cpp
index e74501bcd8637afa85872dae701e91f04827e1ee..cce588ca6dd39a053adfc7282818a16f79139c85 100644
--- a/Source/core/html/ime/Composition.cpp
+++ b/Source/modules/crypto/AesCbcParams.cpp
@@ -29,25 +29,23 @@
  */
 
 #include "config.h"
-#include "core/html/ime/Composition.h"
+#include "modules/crypto/AesCbcParams.h"
 
-#include "core/dom/Node.h"
-#include "core/dom/Range.h"
+#include "public/platform/WebCryptoAlgorithmParams.h"
 
 namespace WebCore {
 
-Composition::~Composition()
+Uint8Array* AesCbcParams::iv()
 {
+    if (!m_iv) {
+        const WebKit::WebVector<unsigned char>& iv = m_algorithm.aesCbcParams()->iv();
+        m_iv = Uint8Array::create(iv.data(), iv.size());
+    }
+    return m_iv.get();
 }
 
-PassRefPtr<Composition> Composition::create(Node* text, Range* caret)
-{
-    return adoptRef(new Composition(text, caret));
-}
-
-Composition::Composition(Node* text, Range* caret)
-    : m_text(text)
-    , m_caret(caret)
+AesCbcParams::AesCbcParams(const WebKit::WebCryptoAlgorithm& algorithm)
+    : Algorithm(algorithm)
 {
     ScriptWrappable::init(this);
 }