Reporting of policy errors via host-offline-reason: part 1

remoting/host/policy_hack/policy_watcher.cc

Index: remoting/host/policy_hack/policy_watcher.cc
diff --git a/remoting/host/policy_hack/policy_watcher.cc b/remoting/host/policy_hack/policy_watcher.cc
index e603cf5032459caaea20f88d40671df5d4aaa0cc..a606376912408675acc25465f1e81958bf841ccd 100644
--- a/remoting/host/policy_hack/policy_watcher.cc
+++ b/remoting/host/policy_hack/policy_watcher.cc
@@ -119,6 +119,7 @@ const char PolicyWatcher::kHostDebugOverridePoliciesName[] =
 PolicyWatcher::PolicyWatcher(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
     : task_runner_(task_runner),
+      transient_policy_error_retry_counter_(0),
       old_policies_(new base::DictionaryValue()),
       default_values_(new base::DictionaryValue()),
       weak_factory_(this) {
@@ -152,16 +153,20 @@ PolicyWatcher::PolicyWatcher(
 PolicyWatcher::~PolicyWatcher() {
 }
 
-void PolicyWatcher::StartWatching(const PolicyCallback& policy_callback) {
+void PolicyWatcher::StartWatching(
+    const PolicyUpdatedCallback& policy_updated_callback,
+    const PolicyErrorCallback& policy_error_callback) {
   if (!OnPolicyWatcherThread()) {
     task_runner_->PostTask(FROM_HERE,
                            base::Bind(&PolicyWatcher::StartWatching,
                                       base::Unretained(this),
-                                      policy_callback));
+                                      policy_updated_callback,
+                                      policy_error_callback));
     return;
   }
 
-  policy_callback_ = policy_callback;
+  policy_updated_callback_ = policy_updated_callback;
+  policy_error_callback_ = policy_error_callback;
   StartWatchingInternal();
 }
 
@@ -175,7 +180,8 @@ void PolicyWatcher::StopWatching(base::WaitableEvent* done) {
 
   StopWatchingInternal();
   weak_factory_.InvalidateWeakPtrs();
-  policy_callback_.Reset();
+  policy_updated_callback_.Reset();
+  policy_error_callback_.Reset();
 
   done->Signal();
 }
@@ -206,6 +212,8 @@ void PolicyWatcher::UpdatePolicies(
     const base::DictionaryValue* new_policies_raw) {
   DCHECK(OnPolicyWatcherThread());
 
+  transient_policy_error_retry_counter_ = 0;
+
   // Use default values for any missing policies.
   scoped_ptr<base::DictionaryValue> new_policies =
       CopyGoodValuesAndAddDefaults(
@@ -229,7 +237,20 @@ void PolicyWatcher::UpdatePolicies(
 
   // Notify our client of the changed policies.
   if (!changed_policies->empty()) {
-    policy_callback_.Run(changed_policies.Pass());
+    policy_updated_callback_.Run(changed_policies.Pass());
+  }
+}
+
+void PolicyWatcher::SignalPolicyError() {
+  transient_policy_error_retry_counter_ = 0;
+  policy_error_callback_.Run();
+}
+
+void PolicyWatcher::SignalTransientPolicyError() {
+  const int kMaxRetryCount = 5;
+  transient_policy_error_retry_counter_ += 1;
+  if (transient_policy_error_retry_counter_ >= kMaxRetryCount) {
+    SignalPolicyError();
   }
 }