[GCM] Wiring heartbeat interval calls to GCMDriver

components/gcm_driver/gcm_client.h

Index: components/gcm_driver/gcm_client.h
diff --git a/components/gcm_driver/gcm_client.h b/components/gcm_driver/gcm_client.h
index cd804b2a520300cf9011700f10d3d902f609a32a..3241b7b27d6f109594c29ff9cf5ae18f52dd45c4 100644
--- a/components/gcm_driver/gcm_client.h
+++ b/components/gcm_driver/gcm_client.h
@@ -320,6 +320,13 @@ class GCMClient {
   // Retrieves the Instance ID data for a specific app from the persistent
   // store.
   virtual std::string GetInstanceIDData(const std::string& app_id) = 0;
+
+  // Gets and sets custom heartbeat interval for the MCS connection.
+  // |scope| is used to identify the component that requests a custom interval

[Nicolas Zea, 2015/05/13 17:57:36]

nit: I'd explicitly call out that it should be a unique identifier for the
component

[fgorski, 2015/05/13 18:59:15]

Done.

+  // to be set, and allows that component to later revoke the setting.
+  virtual void AddHeartbeatInterval(const std::string& scope,
+                                    int interval_ms) = 0;
+  virtual void RemoveHeartbeatInterval(const std::string& scope) = 0;
 };
 
 }  // namespace gcm