[webcrypto] Remove the mock implementation of WebCrypto.

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index 25ca5d13968dfe7ef64c50214b7fb42e9afd240d..28d305dc2016922a55a896fe22044c20a4cb2f11 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -1039,12 +1039,6 @@ void RendererWebKitPlatformSupportImpl::SetMockDeviceOrientationDataForTesting(
 //------------------------------------------------------------------------------
 
 WebKit::WebCrypto* RendererWebKitPlatformSupportImpl::crypto() {
-  // Use a mock implementation for testing in-progress work.
-  WebKit::WebCrypto* crypto =
-      GetContentClient()->renderer()->OverrideWebCrypto();
-  if (crypto)
-    return crypto;
-
   if (!web_crypto_)
     web_crypto_.reset(new WebCryptoImpl());
   return web_crypto_.get();