Notify SyncNetworkChannel about GCM connection state

This change propagates GCM connection state from GCMInvalidationBridge
to SyncNetworkChannel where based on this notification overall
invalidations state is updated.

This change still has issue that when GCM connection is down but HTTP request
succeeds then status is updated to NOTIFICATIONS_ENABLED. Fixing this
requires minor refactoring which I would like to pull into separate change.

BUG=378536
R=rlarocque@chromium.org

Review URL: https://codereview.chromium.org/334253006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278225 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 8 insertions, 1 deletions

diff --git a/components/invalidation/gcm_network_channel_delegate.h b/components/invalidation/gcm_network_channel_delegate.h
index fe997fe..3f89304 100644
--- a/components/invalidation/gcm_network_channel_delegate.h
+++ b/components/invalidation/gcm_network_channel_delegate.h
@@ -24,16 +24,23 @@ namespace syncer {
 // thread and callbacks should be invoked there as well.
 class GCMNetworkChannelDelegate {
  public:
+  enum ConnectionState {
+    CONNECTION_STATE_OFFLINE,
+    CONNECTION_STATE_ONLINE
+  };
+
   typedef base::Callback<void(const GoogleServiceAuthError& error,
                               const std::string& token)> RequestTokenCallback;
   typedef base::Callback<void(const std::string& registration_id,
                               gcm::GCMClient::Result result)> RegisterCallback;
   typedef base::Callback<void(const std::string& message,
                               const std::string& echo_token)> MessageCallback;
+  typedef base::Callback<void(ConnectionState connection_state)>
+      ConnectionStateCallback;
 
   virtual ~GCMNetworkChannelDelegate() {}
 
-  virtual void Initialize() = 0;
+  virtual void Initialize(ConnectionStateCallback callback) = 0;
   // Request access token. Callback should be called either with access token or
   // error code.
   virtual void RequestToken(RequestTokenCallback callback) = 0;