Add expiry time to credentials

This will be used to refetch the credentials if
they have expired.

BUG=1124021

Change-Id: I69abebdb549122c3a928df5eff312bb5ad7f53ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2388942Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803867}

chrome/browser/media/kaleidoscope/kaleidoscope_data_provider_impl.cc

@@ -310,8 +310,10 @@ void KaleidoscopeDataProviderImpl::OnAccessTokenAvailable(
   DCHECK(token_fetcher_);
   token_fetcher_.reset();
 
-  if (error.state() == GoogleServiceAuthError::State::NONE)
+  if (error.state() == GoogleServiceAuthError::State::NONE) {
     credentials_->access_token = access_token_info.token;
+    credentials_->expiry_time = access_token_info.expiration_time;
+  }
 
   for (auto& callback : pending_callbacks_) {
     std::move(callback).Run(credentials_.Clone(),

chrome/browser/media/kaleidoscope/mojom/kaleidoscope.mojom

@@ -5,6 +5,7 @@
 module media.mojom;
 
 import "chrome/browser/media/feeds/media_feeds_store.mojom";
+import "mojo/public/mojom/base/time.mojom";
 import "url/mojom/origin.mojom";
 
 // The result of getting the credentials.
@@ -22,6 +23,9 @@ struct Credentials {
   // An OAuth access token scoped to the Kaleidoscope API for the currently
   // logged in user. If the user is not signed in then this will be empty.
   string? access_token;
+
+  // The time these credentials will expire.
+  mojo_base.mojom.Time? expiry_time;
 };
 
 enum KaleidoscopeTab {