[EasyUnlock] Move DataWithTimestamp out of ForegroundEidGenerator so it can be shared.

chrome/browser/signin/easy_unlock_service_signin_chromeos.cc

Index: chrome/browser/signin/easy_unlock_service_signin_chromeos.cc
diff --git a/chrome/browser/signin/easy_unlock_service_signin_chromeos.cc b/chrome/browser/signin/easy_unlock_service_signin_chromeos.cc
index fc71efaa6848bfb8eb039ef278b3b3623ded45a0..73e4272c96d131c64fe45cfee99b682c107b9e84 100644
--- a/chrome/browser/signin/easy_unlock_service_signin_chromeos.cc
+++ b/chrome/browser/signin/easy_unlock_service_signin_chromeos.cc
@@ -428,25 +428,25 @@ void EasyUnlockServiceSignin::OnUserDataLoaded(
   if (devices.empty())
     return;
 
+  PA_LOG(WARNING) << "Loaded devices: " << devices.size();
+
   cryptauth::RemoteDeviceList remote_devices;
   for (const auto& device : devices) {
-    std::string decoded_public_key, decoded_psk, decoded_challenge;
+    std::string decoded_public_key, decoded_psk;
     if (!base::Base64UrlDecode(device.public_key,
                                base::Base64UrlDecodePolicy::REQUIRE_PADDING,
                                &decoded_public_key) ||
         !base::Base64UrlDecode(device.psk,
                                base::Base64UrlDecodePolicy::REQUIRE_PADDING,
-                               &decoded_psk) ||
-        !base::Base64UrlDecode(device.challenge,
-                               base::Base64UrlDecodePolicy::REQUIRE_PADDING,
-                               &decoded_challenge)) {
-      PA_LOG(ERROR) << "Unable base64url decode stored remote device: "
-                    << device.public_key;
+                               &decoded_psk)) {
+      PA_LOG(ERROR) << "Unable base64url decode stored remote device:\n "
+                    << "public key: " << device.public_key << "\n"
+                    << "psk: " << device.psk;
       continue;
     }
     cryptauth::RemoteDevice remote_device(
         account_id.GetUserEmail(), std::string(), decoded_public_key,
-        device.bluetooth_address, decoded_psk, decoded_challenge);
+        device.bluetooth_address, decoded_psk, device.challenge);
     remote_devices.push_back(remote_device);
     PA_LOG(INFO) << "Loaded Remote Device:\n"
                  << "  user id: " << remote_device.user_id << "\n"