Reporting: Implement serializer.

net/reporting/reporting_observer.cc

Index: net/reporting/reporting_observer.cc
diff --git a/net/reporting/reporting_observer.cc b/net/reporting/reporting_observer.cc
index 5e8d778a61b74a74a70bb6a6ceb8fc6ef7adce7d..f9e9318a2247c98b2c4333f64da18d5e8c0898c0 100644
--- a/net/reporting/reporting_observer.cc
+++ b/net/reporting/reporting_observer.cc
@@ -6,6 +6,10 @@
 
 namespace net {
 
+void ReportingObserver::OnContextInitializing() {}
+
+void ReportingObserver::OnContextInitialized() {}

[shivanisha, 2017/04/10 18:29:29]

There's no implementation of this in any of the observers?
Will the ReportingGarbageCollectorImpl need to implement any of these?

[Julia Tuttle, 2017/04/11 19:20:46]

The DeliveryAgent will need to implement OnContextInitialized to examine queued
reports from prior sessions (if any; currently our default policy prohibits
persisting them) and attempt to deliver them.

The GarbageCollector could also use it as the first time to do garbage
collection.

Come to think of it, though, there's a pretty particular order in which the
classes should be initialized (Persister, then GarbageCollector, then
DeliveryAgent), so maybe I should just hard-code that instead of using observer
callbacks.

+
 void ReportingObserver::OnCacheUpdated() {}
 
 ReportingObserver::ReportingObserver() {}