Update keygen to use correct NSS slot on ChromeOS multiprofile.

content/browser/resource_context_impl.cc

Index: content/browser/resource_context_impl.cc
diff --git a/content/browser/resource_context_impl.cc b/content/browser/resource_context_impl.cc
index c2f22073e0b9ee625050c3ade849c601977d778a..1bc9e4acbd489992b465d315042ae1f8399192a2 100644
--- a/content/browser/resource_context_impl.cc
+++ b/content/browser/resource_context_impl.cc
@@ -13,6 +13,7 @@
 #include "content/browser/webui/url_data_manager_backend.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "net/base/keygen_handler.h"
 #include "net/ssl/client_cert_store.h"
 
 using base::UserDataAdapter;
@@ -63,6 +64,15 @@ scoped_ptr<net::ClientCertStore> ResourceContext::CreateClientCertStore() {
   return scoped_ptr<net::ClientCertStore>();
 }
 
+scoped_ptr<net::KeygenHandler> ResourceContext::CreateKeygenHandler(
+    uint32 key_size_in_bits,
+    const std::string& challenge_string,
+    const GURL& url,
+    const base::Callback<void(scoped_ptr<net::KeygenHandler>)>& callback) {
+  return scoped_ptr<net::KeygenHandler>(
+      new net::KeygenHandler(key_size_in_bits, challenge_string, url));
+}
+
 ChromeBlobStorageContext* GetChromeBlobStorageContextForResourceContext(
     ResourceContext* resource_context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));