Persist Instance ID data to GCM store.

chrome/browser/extensions/api/instance_id/instance_id_api.h

Index: chrome/browser/extensions/api/instance_id/instance_id_api.h
diff --git a/chrome/browser/extensions/api/instance_id/instance_id_api.h b/chrome/browser/extensions/api/instance_id/instance_id_api.h
index 9bb404a8139326a49bf1e1652287ceec56dda319..6ae1f9d02f143037c36dc5c8b0562ab7e58a2375 100644
--- a/chrome/browser/extensions/api/instance_id/instance_id_api.h
+++ b/chrome/browser/extensions/api/instance_id/instance_id_api.h
@@ -47,6 +47,8 @@ class InstanceIDGetIDFunction : public InstanceIDApiFunction {
   ResponseAction DoWork() override;
 
  private:
+  void GetIDCompleted(const std::string& id);
+
   DISALLOW_COPY_AND_ASSIGN(InstanceIDGetIDFunction);
 };
 
@@ -64,6 +66,8 @@ class InstanceIDGetCreationTimeFunction : public InstanceIDApiFunction {
   ResponseAction DoWork() override;
 
  private:
+  void GetCreationTimeCompleted(const base::Time& creation_time);
+
   DISALLOW_COPY_AND_ASSIGN(InstanceIDGetCreationTimeFunction);
 };