Update keygen to use correct NSS slot on ChromeOS multiprofile.

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index d68addeb2c2d0f76b9a12a60dc0344c6cf839849..af7c0666f92a27b0216be3a5ffe941d61fea10dc 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -364,6 +364,12 @@ class ProfileIOData {
     virtual net::HostResolver* GetHostResolver() OVERRIDE;
     virtual net::URLRequestContext* GetRequestContext() OVERRIDE;
     virtual scoped_ptr<net::ClientCertStore> CreateClientCertStore() OVERRIDE;
+    virtual scoped_ptr<net::KeygenHandler> CreateKeygenHandler(
+        uint32 key_size_in_bits,
+        const std::string& challenge_string,
+        const GURL& url,
+        const base::Callback<void(scoped_ptr<net::KeygenHandler>)>& callback)
+        OVERRIDE;
     virtual bool AllowMicAccess(const GURL& origin) OVERRIDE;
     virtual bool AllowCameraAccess(const GURL& origin) OVERRIDE;
     virtual std::string GetMediaDeviceIDSalt() OVERRIDE;