Cleanup: remove WebCryptoResultPrivate from blink API.

Source/core/platform/chromium/support/WebCrypto.cpp

Index: Source/core/platform/chromium/support/WebCrypto.cpp
diff --git a/Source/core/platform/chromium/support/WebCrypto.cpp b/Source/core/platform/chromium/support/WebCrypto.cpp
index cd4e17994c0a1e2ef82dac335249a385579ac96f..0775affa3e63df2b97facdfc5943390901597889 100644
--- a/Source/core/platform/chromium/support/WebCrypto.cpp
+++ b/Source/core/platform/chromium/support/WebCrypto.cpp
@@ -29,8 +29,10 @@
  */
 
 #include "config.h"
-#include "public/platform/WebArrayBuffer.h"
 #include "public/platform/WebCrypto.h"
+
+#include "modules/crypto/CryptoResult.h"
+#include "public/platform/WebArrayBuffer.h"
 #include <string.h>
 
 namespace WebKit {
@@ -78,9 +80,4 @@ void WebCryptoResult::assign(const WebCryptoResult& o)
     m_impl = o.m_impl;
 }
 
-void WebCryptoResult::assign(WebCryptoResultPrivate* impl)
-{
-    m_impl = impl;
-}
-
 } // namespace WebKit