Refactor WebCrypto code

content/child/webcrypto/openssl/aes_kw_openssl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/common/android/surface_texture_lookup.h"
-
 #include "base/logging.h"
+#include "content/child/webcrypto/openssl/aes_key_openssl.h"
+#include "content/child/webcrypto/status.h"
 
 namespace content {
 
+namespace webcrypto {
+
 namespace {
-SurfaceTextureLookup* g_instance = NULL;
+
+class AesKwImplementation : public AesAlgorithm {
+ public:
+  AesKwImplementation() : AesAlgorithm("KW") {}
+
+  virtual Status Encrypt(const blink::WebCryptoAlgorithm& algorithm,
+                         const blink::WebCryptoKey& key,
+                         const CryptoData& data,
+                         std::vector<uint8>* buffer) const OVERRIDE {
+    // TODO(eroman):
+    return Status::ErrorUnsupported();
+  }
+
+  virtual Status Decrypt(const blink::WebCryptoAlgorithm& algorithm,
+                         const blink::WebCryptoKey& key,
+                         const CryptoData& data,
+                         std::vector<uint8>* buffer) const OVERRIDE {
+    // TODO(eroman):
+    return Status::ErrorUnsupported();
+  }
+};
+
 }  // namespace
 
-// static
-SurfaceTextureLookup* SurfaceTextureLookup::GetInstance() {
-  DCHECK(g_instance);
-  return g_instance;
+AlgorithmImplementation* CreatePlatformAesKwImplementation() {
+  return new AesKwImplementation;
 }
 
-// static
-void SurfaceTextureLookup::InitInstance(SurfaceTextureLookup* instance) {
-  DCHECK(!g_instance || !instance);
-  g_instance = instance;
-}
+}  // namespace webcrypto
 
 }  // namespace content